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Old 11-21-2010, 03:57 PM   #42076
Trbig67
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Quote:
Are you trollin?

LOL.. I have read a bit here, but I'm a mod on another motorcycle site for those old Yamahas. And apparently I lied to you about Valvoline being the only oil I didn't like. I had two motors crater from oiling issues using that Rotella. The motors were air cooed inline 4's. One spun a crank bearing and another just wiped out new bearings. It may not have been the oil's fault, but it was coincidence enough for me with all the other brands out there to not try for #3.

I have an order ready from Rockymountainatv with a couple tires, so I was going to try the All Balls roller from them since I've gotten into the free shipping price range.
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Old 11-21-2010, 04:16 PM   #42077
NordieBoy
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Hmmm...
Quote:
Originally Posted by Trbig67
This was one of the places I'd read it...
Quote:
Originally Posted by Adv Grifter
Things he did I would not have done, or done differently:
1. Tank foam. I've never noticed sloshing in my IMS tank. Unnecessary - Would love some tank foam.

5. Wrong jetting. He complained of poor fuel economy but did the Jesse air box and jetting mod wrong, going with a 170 main jet, should have had a 155 main. - 160 for aftermarket pipe and airbox opened.

6. Grinding out header weld. Suzuki did this for a reason, it is NOT a mistake. Grind it out and you lose MPG and TORQUE. Ask them. - If it wasn't a mistake it'd be consistent not only in the actual weld but also between bikes. Some have a 5mm lip, some have a 10mm lip, or more.

7. All Balls Chain Rollers. The real solution here is to remove BOTH upper and lower chain rollers completely. Not needed. Period. They just make noise. - Leave the bottom one in.

8. 18T countershaft sprocket. Just dumb. - Yep. Who wants to be able to do the speed limit in 1st gear.
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Old 11-21-2010, 05:18 PM   #42078
maynard911
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[quote}



And... is there any noticeable difference using the K&N filter over the stock foam? It doesn't look like it had that spot built into it for the little element support to hold? Does it lean out the mix?[/quote]

Yep ,the difference is the amount of dirt entering your engine. If you really must use a K&N get the foam cover that ProCycle sells. Stock is better, Twin Air probably better yet. If you stick to the pavement a K&N is probably ok, but an air filters ability to trap dust is inversely proportional to it's flow rate, one of those no free lunch things.
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Old 11-21-2010, 05:36 PM   #42079
dirtmucker
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MXoN Ride: SoCal to Lakewood, CO

I know that it is not a big feat for DR's to circle the globe but here is yet another store of a fun road trip that a buddy and I took in September:

http://www.advrider.com/forums/showt...4#post14541994
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Old 11-21-2010, 05:39 PM   #42080
procycle
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Quote:
Originally Posted by kobudo28
Care to weigh in on the header pipe debate? Is there any merit to an oversized front pipe or "power bomb" front pipe?
Sure, I'll weigh in.
MX-Rob's dyno chart has been posted here and on ThumperTalk. The bike belongs to NY T100 and has the 725 big bore and Web 245 cam. You can't make an across the board judgment on the header pipe question based on one dyno test especially on a bike that has a cam nobody else is running.

Here's today's back to back tests with the PowerBomb header (black line) and stock headpipe (blue line). Horsepower first, then torque.

.


The top end gains and higher peak torque of the PowerBomb easily outweigh the small advantage the stock header has at 4000 rpm. OK, this bike isn't exactly representative of the the typical DR650 either. 780cc big bore, big valve head, 190 cam, TM40, FMF PowerCore 4. Even if the PowerBomb did nothing it looks so much more right on the bike compared to the skinny little stock pipe that IMHO it's worth the price.
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Old 11-21-2010, 05:50 PM   #42081
NordieBoy
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Quote:
Originally Posted by procycle
OK, this bike isn't exactly representative of the the typical DR650 either. 780cc big bore, big valve head, 190 cam, TM40, FMF PowerCore 4.
But the ummm... blinkers are stock?

I wouldn't mind my stock header putting out 48-49hp either.

So is it run in yet?

How's it ride?

Where's the vids?

Now!
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Old 11-21-2010, 06:05 PM   #42082
Rumlover
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OK, this bike isn't exactly representative of the the typical DR650 either. 780cc big bore, big valve head, 190 cam, TM40, FMF PowerCore 4. Even if the PowerBomb did nothing it looks so much more right on the bike compared to the skinny little stock pipe that IMHO it's worth the price.[/quote]


I got to admit the skinny stocker could use an upgrade in the looks department, but I think that chart shows the stocker working pretty darn good. It doesn't start to lose ground to the bigger pipe until around 5000 RPM when that big piston and valves really start to pump out some exhaust. Love the 780 project and enjoy reading about all the progress!
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Old 11-21-2010, 06:17 PM   #42083
procycle
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Quote:
Originally Posted by Rumlover
but I think that chart shows the stocker working pretty darn good. It doesn't start to lose ground to the bigger pipe until around 5000 RPM when that big piston and valves really start to pump out some exhaust. Love the 780 project and enjoy reading about all the progress!
The stock head pipe looses ground at any RPM over 4400. It's also at a disadvantage right off the very bottom. It's a lot easier to see what's happening by looking at the torque curve instead of the horsepower curve.
The big piston and valves are working full time the whole time
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Old 11-21-2010, 06:27 PM   #42084
procycle
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Quote:
Originally Posted by NordieBoy
But the ummm... blinkers are stock?

I wouldn't mind my stock header putting out 48-49hp either.

So is it run in yet?

How's it ride?

Where's the vids?

Now!
Stock blinkers?? Never!

Got it out on the road yesterday for a 30 mile shake down ride. Wow, it pulls 5th gear with the same authority the previous (725) motor did in 4th. Runs nice an smooth down low too. Acts very civilized droning along at low rpm.
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www.procycle.us - Everything for your DR650 and lots of other great stuff!
DR900 Big Bore Stroker buildup
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Old 11-21-2010, 06:44 PM   #42085
Rumlover
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Quote:
Originally Posted by procycle
The stock head pipe looses ground at any RPM over 4400. It's also at a disadvantage right off the very bottom. It's a lot easier to see what's happening by looking at the torque curve instead of the horsepower curve.
The big piston and valves are working full time the whole time
I wasn't trying to imply that the stock pipe was a good application for the 780. I was just thinking that as good as it did with the bigger piston it would probably be more then adequate for a near stock setup.
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Old 11-21-2010, 07:00 PM   #42086
Trbig67
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OK.. Electrical question. I was riding home last night in the dark, and the headlight would flicker occasionally.. brighter, then a bit dimmer. Is that just the charging system on these or do I have some loose/corroded connections to clean up? Also.. above maybe 3k rpm (Just a guess with no tack..) the blinkers blink really fast, but below that and at idle they blink at what I would call a normal rate.
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Old 11-21-2010, 07:14 PM   #42087
eakins
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i guess my question would be how much did all that cost and what happens to the lower end with all the extra push? if there is truth that there is a weak 3rd gear then this top would break that bottom. yes no?

Quote:
Originally Posted by procycle
The stock head pipe looses ground at any RPM over 4400. It's also at a disadvantage right off the very bottom. It's a lot easier to see what's happening by looking at the torque curve instead of the horsepower curve.
The big piston and valves are working full time the whole time
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Old 11-21-2010, 07:32 PM   #42088
procycle
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Quote:
Originally Posted by Rumlover
I wasn't trying to imply that the stock pipe was a good application for the 780. I was just thinking that as good as it did with the bigger piston it would probably be more then adequate for a near stock setup.
Maybe. It's just guesswork without doing the testing. Back before FMF ever made any head pipes for the DR I did a back to back test between the stock header and the one Jesse used to have made in Taiwan (or somewhere). Even though the workmanship on the Jesse headpipe was poor to say the least (it looked good from the outside) it made slightly better low end and about the same top end as compared to the stock header.

Adequate? Sure. Best? Hmm... Depends on the bike setup, intended purpose, rider's preferances, etc, etc. MX-Rob has condemned the PowerBomb as a 'power-buster' but so far that only applies to NY-T100's bike and only if you don't care about top end power. That top end power is pretty useful on a long hillclimb or passing a truck on a 2-lane road. Not to mention it's just plain fun to twist the throttle and let her rip every once in a while. Run 80 mph across the open desert? Keep up with traffic on a California freeway? You can't do that with bottom end
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Clarke's second law of Egodynamics: "For every expert, there is an equal and opposite expert." - Jasper Fforde
www.procycle.us - Everything for your DR650 and lots of other great stuff!
DR900 Big Bore Stroker buildup
TurboDiesel Corvette - go to the end to start at the beginning
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Old 11-21-2010, 07:43 PM   #42089
procycle
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Quote:
Originally Posted by eakins
i guess my question would be how much did all that cost and what happens to the lower end with all the extra push? if there is truth that there is a weak 3rd gear then this top would break that bottom. yes no?
Here's why I'm not worried about overpowering 3rd gear.
The 3rd gear issue seems to be a random failure. There doesn't seem to be any correlation between modified motors or even hard riding and 3rd gear incidents. Mileage doesn't even seem to be a factor. It's happened to nearly new bikes and bikes with 30,000+ miles on them. In addition i believe the biggest stresses are put on the transmission by hard downshifts or breaking over stutter bumps. Those things will put much larger shock loads back up into the transmission than anything the motor will dish out.

We're only talking about a little more than 50 hp and 50 lb/ft of torque. In the grand scheme of motorcycle things that's still pretty tame (so far).
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www.procycle.us - Everything for your DR650 and lots of other great stuff!
DR900 Big Bore Stroker buildup
TurboDiesel Corvette - go to the end to start at the beginning
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Old 11-21-2010, 08:57 PM   #42090
planemanx15
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thought of another part i'd like to add to my DR... Seems the PO removed the stock rear fender with the license plate holder.. that vertical piece just after the top of the fender...(not the best description). I would have to assume he didn't like the way it looked, but I do. Anybody have one of them their looking to sell?
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