The KTM300 Thread

Discussion in 'Thumpers' started by GasGas300, Jan 11, 2010.

  1. TrailTrauma

    TrailTrauma Radioactive

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    Thanks man. SCRUBdesignz were great to deal with. Offered customization, including nice upper fork pieces. Although I haven't applied those yet. Since I've had mine done I see more and more fluo yellow around, particularly in Europe (they're always a step aahead of us in NA).
  2. alvincullumyork

    alvincullumyork Ol Two Flags

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    Friday morning my mechanic Dusty Bear and I started tearing down my 3 hunny for a top end. The original piston was a little loose when we put the RK TEK head in so I ordered a top end kit. We were originally going to do it after the race but I figured might as well get er done... That almost came back to bite my ass hard. The cylinder was smooth but no scoring or scratches.

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    Original piston after 83.7 hours of abuse. Getting significant blow by and it had some play in it. Dusty bear hit the cylinder with the ball hone to get some cross hatching and then we opened up the brand new from RMATV Vertex piston kit....


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    SHIT!!!! FUCK!!!!!!!! FUCKKKKK!!!!!! out of the box the skirt was cracked. about an hour of phone calls later not a single moto shop had a top end in stock within a 200 mile radius. I called RMATV explained I had a race on Sunday and needed a piston over-nighted to the race. Not a problem. They Fedex'ed it to the middle of nowhere central Washington to the 'Resort' which is basically a general store and a couple of RV spots! This is why I do business with RMATV, customer service that is beat by none!!!

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    We buttoned up the 3 hunny with a plastic bag and loaded everything and everyone up. 5 Families with kids, enough bikes for everyone plus a couple of extras, a handful of stupid 4 wheelers, 7 dogs, 3 toyhaulers, 1 travel trailer, and me. One guy blew a truck tire and we got a late start and pulled in after dark. I stuck two of my favorite minions in my sweatshirt and made them walk around like that for about an hour.

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    The two goons on the grills are broken, one with a broke collar bone and the other with a broken heel, so they cooked and got to be pit moms for the kids. Dusty Bear is supervising.

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    BACON!!!!! I ate most of it...

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    Ryder and Rut. I'll let you guess which one is which. You can tell they come from dirt bike families...

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    He has a hard life...

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    The top end showed up at the store around 1:30 so we dropped her in in the back of one of the toyhaulers.

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    Here are a couple of the bikes. 2 17 300XCs, KX100, TTR 125, TTR230, KX450, FX450, TC50, CR150R, 200XCW, and a Huffy. It started to rain so we pulled them all under pop ups.

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    The Huffy was the last to get moved....

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    That night I registered and the weight of racing A started to set in.

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    The next I helped with the kids during their two races. Out of 7 kids 5 brought home some hardware with 2 1st places, 1 2nd and 2 3rds. Leading the pack here is Casen who ended up in 3rd but should have got 2nd!

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    My mom and dad decided to show up and brought my mutt Molly. Like her dad she does not like 4 wheelers and promptly jumped off.

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    While I was racing my dad took over my duties as chief kid entertainer.

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    The Vet A line!

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    I was rubbing with 2nd through the 1st turn but he start to pull on me by the third turn.

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    Last year at this race I ended up peeing my pants while on the track which is incredibly hard to do. This year I made it to the pits so I coupld piss my self a little easier... It was still really hard to do! Mixin gas and pissin pants! Evan was quick on the draw with the gas and the ripper spout I just got worked pretty well but needs some kinks worked out.

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    Results posted and no protests! YEE YEE!!!!!!

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    Molly and me collecting the trophy!

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    Dusty Bear got 2nd in Vet B as well!

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  3. Gordy

    Gordy Team Listo

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    :clap So much good in this post! Thanks!!
  4. Anatoli

    Anatoli Pale rider

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    Thanks for the wonderful photo montage of your weekend. You have captured what I love about America most. Friends and family having the best of times outdoors together. With the puppies!
  5. alvincullumyork

    alvincullumyork Ol Two Flags

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    Geeze, let a guy puts some words down!!! I'll do a short break down of the race itself in a bit.

    Thanks guys!!!
  6. alvincullumyork

    alvincullumyork Ol Two Flags

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    So the actual race.... I was the second guy to the starting line for my class and after a little looking at the first two turns I picked a decent spot. The rest of my line slowly filtered in and then we waited for the start. The first line, the AA guys, were started with a small cannon. After that Open A went on a flag and then my line was up. The flagger walked out, pointed at us one by one and raised the flag. It was a live engine start and I launched forward in second gear and quickly banged into third. I came through the first corner almost rubbing with the guy in 2nd and eating the roost from the 1st. After the next several turns I settled into third and then started to pass Open A guys. After the first half of the lap my buddy from the sideline counted me as 7th overall but after looking at the pictures it looks more like I was 10th to 12th overall at that point. I think I may have pushed my way into 2nd place, in my class, at this point but I can't be sure.

    This course has some super gnarly long and straight sections that let you really open up the bike but you better have a set of brass ones because of all the run off ditches. They will sneak up on you even at a slow place and some of them will swallow a bike whole. Most of them are marked but that first lap was pretty tricky. I watched one guy in the first race hit a little one at speed and get thrown from his bike. He ended up face down with the wind knocked out of him while his bike kept riding by itself until it slammed into the bigger rocks and took out his exhaust and a radiator. A couple other guys did some awesome flying Ws over the same ditch. I decided that one wasn't worth it and slowed down for it. After that I was in the rocks.

    The day before I took one of the older kids in our group out to a section of baby heads to practice and was riding through them in 3rd gear no problem. During race though, at least for the first three laps I couldn't keep the bike upright! I had two crashes my first lap and then two more crashes during my next two laps. My brand new FMF Fatty is beat up pretty badly and might need to be replaced, there are two small dents in one radiator and I put a bad kink in my neck. I got past each time I went down but I caught back up to each guy, it just took me time and effort I should not have had to spend.

    Once I was out of the rocks I really poured on the gas. My buddy with the broken collarbone was able to follow my mechanic Dusty Bear for a full lap around the track with his drone. He said he tried to follow me but the drone couldn't keep up! 2nd place Vet B vs 2nd place Vet A. About half the race was on a mostly dry lake bed and only broken up by turns in the track and the run off ditches. I was able to hold 4th gear through most of this section and for one long section I pinned it back in 6th gear! It's a hell of a thing to hold top end on dirt bike through rough terrain. I'm running 14/50 sprockets right now and gearing commander says that is good for 87 mph at 8500 rpm. I bet with the Fatty, RK TEK head and smart carb I'm running a bit higher rpm than that but with wheel spin and a solid head wind I'd say 80 mph is probably realistic.

    After that long straight stretch there were several short but fast chunks. I tried hitting all of the run off ditches hard for the first couple of laps but there were three that just weren't worth it. I blew through my fork travel like it wasn't even there twice. Just a bone jarring smack when I bottomed out. Luckily I never crashed besides the times in the rocks. I was running 130 PSI in my forks which I should have realized was a mistake. That is what I normally run for trails and tighter work. It worked well in the rocks but this was a really fast course and I should have been closer to 145 if not higher for the race.

    I was told each lap was about 10 miles long at the riders meeting so I decided to pit for gas after 4 laps. I have the Smart Carb on now but I still haven't done a good mileage check with it yet and I'm still having some problems with it. I haven't had time to really tune it either but the idle is really low and stalls out more often than I like. It also bogged out in the air a couple of times coming off of small jumps, that wasn't a huge issue at this race but could be very painful on a bigger jump. Before my top end but after I put on the carb and then again after I put on the TEK head I had issues with the bike cutting out on the top end of the rev range. After the top end it only happened a couple of times but was still frustrating. The biggest frustration of all was the mileage I got out of a tank. When I came in after my 4th lap I was really low on gas and I had gone less than 40 miles, that is basically what I was getting with the stock carb. On my 8th lap I was worried about making it around for the last lap and there was a chance I was going to have to do 2 more, so I pitted for more gas. I don't know if it cost me anything, position in class or overall, but it was frustrating. The guy who got first in Vet A was on a 2017 TX300 with a Lectron and 3.2 gallon dry break tank and didn't stop for gas. If each lap was 9.5 miles and the first lap was 6 he went roughly 82 miles on one tank, so at worst he was getting 25 MPG.... I bought the smart carb for mileage first and better performance second, so far it has fallen short on both. I do need to do some more tuning but at this point I am a little disappointed.

    For pretty much the whole race I was passing people and only got past a couple of times besides my crashes. I still got lapped by some of the AA guys which is just insane. They are gnarly fast and for more than 2 and half hours they just keep banging away like it's nothing. I felt good for most of the race and was even hoping every time I came through the checkpoint for one more lap. One more lap to bump up one more spot overall or catch the next guy in my class. I had no idea how I was doing after the first lap and was halfway convinced that my crashes had put me close to last. Just before coming into the checkpoint before my last lap I tried racing a racing a AA guy who was lapping me. I don't know what I was thinking but I held him off for a couple of turns. I felt bad and even found him afterword and apologized. He was cool about and said no worries. Coming into the checkpoint for the finish I did battle with a AA or Open A guy for a couple of turns until he got around me only to crash on the second to last turn. I got the checkers right before him and hopefully got one more overall spot but I won't know until the official results are posted.

    Last year I ran in Open B at this race and lost to a 14 year old on a 200. I was talking about him with my parents while we were waiting around for trophies and he piped up from right behind me. Turns out he is riding a 17 250XC this year in Open A at only 15 years old, he took 3rd at this race. After a quick look at the score cards I think I edged him out this year but until the official overalls are posted I won't know. He ended up getting 2nd overall in the Desert 100 (50 mile division) this year when I got 33rd on my 950! He is pretty cool kid and at only 15 has a bright offroad future.

    After Dusty Bear and I got our trophies we all started loading up. I felt like I had played two games of football and run a marathon but we managed to throw everything in one rig or another and hit the road. We all met up at burger joint and had dinner before blowing for home. After the burger I fell asleep with Molly as my pillow in the back seat of my dads truck.

    I still have a lot of room for improvement and am fairly happy with my performance but I know that at a bigger race with better competition I wouldn't have made the podium riding like I did. Corners are going to be my next big focus followed by rocks. I'm selling my 200 and will probably pick up a 250F moto bike mostly just to work on corners... and jumping...
  7. Rusty Rocket

    Rusty Rocket Life behind "Bars"

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    great vid and that looks like a fun event. I had a friend (mid pack A rider) who said he could feel the difference between an ultra heavy duty tube and a standard one. He did not the the heavy feel of the of the ultras so he would only use regular tire tubes, I didn't believe him, but in retrospect he may have been onto something
    TrailTrauma likes this.
  8. kjclark7

    kjclark7 Long timer

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    I'm going to swap forks tomorrow and see if that makes any difference in the feel of the bike. I'm still trying to get the bike dialed in and I'm going in circles with my suspension settings. one day I get it decent and the next time I ride it's terrible. So just to make sure there's not something up with the forks, ill try my other set of forks and see if the bike still feels off.

    Sent from my SM-G920V using Tapatalk
  9. Rusty Rocket

    Rusty Rocket Life behind "Bars"

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    you know about setting the forks parallel when you clamp the axle.
  10. kjclark7

    kjclark7 Long timer

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    After I tighten down the brake disk side, I compress the forks a few times then tighten down the pinch bolts on they other side.

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  11. Rusty Rocket

    Rusty Rocket Life behind "Bars"

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    zackly. I put a stubby flatblade screwdriver in the fork clamp slot to spread it slightly open so to be sure it can freely slip on the axle and then after the compressing thing, I carefully balance the bike perfectly upright so twisting of the front end won't mis-align things before things get clamped.
    RAZR and ONandOFF like this.
  12. TrailTrauma

    TrailTrauma Radioactive

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    I have a tech Q I was hoping might have a simple answer.

    * When practicing pivots I sometimes get this annoying hyper-rev from the engine. Yes, it's me twisting the throttle like a dork, but it seems to take some time to chill even after I snap the throttle off.

    * Then today on some whoops I traded bikes with my buddy and he reported that on one of the whoops my throttle seemed to spool out of control, and just as he was about to kill the engine it came down slowly.


    What are my go to suspects here? Is something catching, or binding? My throttle is smooth, and quite free moving. No added tension, and has the requisite 1/8 free play.

    My carb has been running great all season, and when the bike is sitting, snapping the throttle or revving it out and letting go seem to be normal.

    1 thing I'm going to do is pull a bit of slack down in the throttle cable .. from throttle to carb. I looked tonight as I came in and I don't have enough pulled down to allow a purely vertical attitude as it enters the carb. It's kind of at a 60 degree angle and heads off up towards the grip.


    Thanks
  13. ONandOFF

    ONandOFF more off than on

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    :hmmmmm
    Why not just go back to TuBliss?
  14. TigerTanker

    TigerTanker Husqurducycle

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    I am recovering from deep bruised thighs, calf tear, Achilles, and a re injury of left shoulder and....perhaps a concussion. But, I found a great place to recover before heading home on Sunday. Newport dirt bike rider spa...

    7E5F9F8C-E4C3-4054-8948-1D1C71290F36.jpeg

    Lee, congrats!!!

    On the 14th there is a Little Naches ride planned. My 300 will be rebuilt and ready to ride.
  15. ONandOFF

    ONandOFF more off than on

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    That's awesome your parents came out. And that they're still together. Good peeps.

    How about a ripper spout for your zipper? :pynd

    Racing was never for me, but i enjoy your detailed descriptions of it, and pictures. Great times and memories!

    Did the bike run stronger with the new piston?
    alvincullumyork likes this.
  16. kjclark7

    kjclark7 Long timer

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    I'm giving these nitros a fair shake. Tubliss is a great system that has worked well for me over the past 2 years / 200+ hours. But with racing enduros, a flat can ruin your day and your race. Even though fixing a flat with when using tubliss is quick and easy, and you can ride out with a flat, your not riding race pace with a front flat tire.
    So for the one flat I got this year and one last year during a race, I figured I try the mousse out.
    I'm actually hoping something is wrong with my cc forks so I can say, that's why I can't get the bike to feel good but we'll see.
    I just swapped forks and put my 4cs back on. Those are spot on so if I still feel out of sorts then I know its the nitros.
    I rechecked my sag tonight and it was actually off by 2-3 mm. I fixed that, put all my clickers back to normal and I'm hoping for the best.

    Sent from my SM-G920V using Tapatalk
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  17. ONandOFF

    ONandOFF more off than on

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    If you tug on the cable sheath, at the grip, and again at the carb, it should not rev up. If it does then you have a loose cable end.
  18. TrailTrauma

    TrailTrauma Radioactive

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    'loose cable end'. Wouldn't that reveal itself with more than 1/8" free play in the throttle grip?

    I'll try that tomorrow for sure.
  19. ONandOFF

    ONandOFF more off than on

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    Yikes, 2-3mm????
    The horrors!!!

    That's like the thickness of a credit card vs the stroke of like the sole length of a size 13 boot. Can't be too careful, though. ;)

    I didn't think about getting flats in a race. Have you tried the prescribed amount of slime with the TuBliss?

    Of course it all might boil down to getting used to the sloppiness of the mousse?
    alvincullumyork likes this.
  20. ONandOFF

    ONandOFF more off than on

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    :thumb
    TrailTrauma likes this.