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Old 10-02-2012, 04:08 PM   #14746
crypto666
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Quote:
Originally Posted by CeeBee View Post
I would like to put a 16 tooth countershaft sprocket on my XR650R. IS it possible if I take off the case saver?? If it is do you know how or where I can find one. Want to run 4-500 miles then change to 14 or 15 -- alot easier than switching out the rear.

Any help is appreciated
Thanks, Chuck

I think you will be dissapointed. It is very hard to find a setup where you only change the CS and don't also have problems with chain length. Let us know what works.
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Old 10-02-2012, 04:11 PM   #14747
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Originally Posted by medisyn View Post
I am pretty sure I have the carb put together right, but I still cannot get it started. All I get is a backfire after 20+ kicks. I did check/do the valves and they are now in spec. (Assuming I did it right, I am pretty sure I did.)

Fuel is flowing fine out of the tank, petcock is on and the float bowl has fuel in it. What is a good procedure to test spark? Also should I pull the plug and see if its wet? Pretty much I changed the jets to a 68s, the uncork needle on the 3rd clip and a 175 main jet. The new insulator is installed as well and I took the rubber boot out of the filter box. I have tried adjusting the idle screw from one turn to 3+. I have tried messing with the throttle stop as well. I am not sure what the right spec is for it though.

I have tried choke, half-choke and no choke. Partial, full and no throttle as well. It never even sputters or anything. Just kick and sometimes a loud ass backfire. I need a drink.

Yeh, it sounds like your carb should be good and I would be checking the spark also. Maybe as simple as a plug change. For sure check to see if its wet. I have been known to sniff exhaust pipes for fuel when things don't start.

Make sure your decomp cable has some slack in it; it could be hanging a valve up.
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Old 10-02-2012, 04:11 PM   #14748
Cpt. Ron
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With it backfiring like that, it sounds like you have spark. Try this. Remove airbox cover and air filter. Spray some carb cleaner into the throat of the carburetor and try to start it. If it fires and runs for a short bit, I'd dig back into the carb and fuel delivery. If it only backfires or pops, I'd start checking the spark.

Is this a known good spark plug? Remove the spark plug cap from the spark plug, insert new/spare spark plug and ground it to the engine. Pull in the decompression lever and have somebody kick it over a few times. You should see a nice blue spark.
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Old 10-02-2012, 04:36 PM   #14749
medisyn
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Quote:
Originally Posted by Cpt. Ron View Post
With it backfiring like that, it sounds like you have spark. Try this. Remove airbox cover and air filter. Spray some carb cleaner into the throat of the carburetor and try to start it. If it fires and runs for a short bit, I'd dig back into the carb and fuel delivery. If it only backfires or pops, I'd start checking the spark.

Is this a known good spark plug? Remove the spark plug cap from the spark plug, insert new/spare spark plug and ground it to the engine. Pull in the decompression lever and have somebody kick it over a few times. You should see a nice blue spark.
Yeah it will only backfire once after maybe like 15 min of kickstarting. The spark plug is known to be good. This was a 2-5 kick start bike cold with no choke before I tried to "improve" it. Yesterday was hot and I tried to kick it many times after tinkering with it. I got super sweaty and lost so much water weight somebody asked me if I recently lost weight.
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Old 10-02-2012, 04:59 PM   #14750
galland1
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Classic fail.


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Old 10-02-2012, 05:17 PM   #14751
CeeBee
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Quote:
Originally Posted by 415MC View Post
Yes a 16t works. I bought mine from Sprocket Specialist. I used it with the stock chain and a 48t rear. 16-48 is same ratio as a 15-45---very good dual sport gear ratio.
Thanks 415MC,
Ijust called them and they said there on 4 week back order and call back later- no waiting list. Glad to know they are still available. THANKS

Later, Chuck
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Old 10-02-2012, 05:42 PM   #14752
jesusgatos
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Quote:
Originally Posted by crypto666 View Post
I think you will be dissapointed. It is very hard to find a setup where you only change the CS and don't also have problems with chain length. Let us know what works.
14/48 and 16/45 works great! 16T countershaft sprocket will also work with a case saver if you clearance it. There's not much left, but it's better than nothing.
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Old 10-02-2012, 06:21 PM   #14753
Sean-0
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The 16works well its a standard. Setup for Australian spec bikes ..I run a 16 45 for long haul and run a 48 rear at times with a 16 front or you could go a 15 45 for a good combo or run the 48 with either. A 16 or a 15 all this works with a 110 link chain as for a case saver the stock saver. On the aus spec bikes will fit a 16 tooth cs sprocket ..with 16 /45 I can sit on 70mph all day and the bike loves it at about 5000 rpm

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Old 10-02-2012, 07:21 PM   #14754
jesusgatos
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uh huh, cruising all day long at 80mph and a stock engine will also push +110mph with that gearing too.
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Old 10-02-2012, 07:51 PM   #14755
galland1
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She's starting to come together. Just waiting on a few more bits. The Unabikers are a bit of a bioch to install. Have the right tools to do this job or you will swear alot..:





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Old 10-02-2012, 09:01 PM   #14756
RZRob
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Look again

Quote:
Originally Posted by medisyn View Post
Yeah it will only backfire once after maybe like 15 min of kickstarting. The spark plug is known to be good. This was a 2-5 kick start bike cold with no choke before I tried to "improve" it. Yesterday was hot and I tried to kick it many times after tinkering with it. I got super sweaty and lost so much water weight somebody asked me if I recently lost weight.
Consider what you did - and what you didn't. Starting the bike relies solely on the pilot circuit. I'd be seriously checking that again. Remember the atomizer holes. Also, pull the main and the emulsion tube under it and again, check those atomizer holes. Confirm the petcock is FLOWING before you go anywhere. Gas that sits turns to goo. I just got done with a new XR that sat for 10 years and the petcock was beyond repair and the carb was sketchy, but patience prevailed. Finally, if you don't follow the starting procedures - no gas - it won't start.

Also, if you messed with the float, take a common-sense look at the valve/float level.Make sure the valve actually opens.

RZ Rob
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Old 10-02-2012, 09:41 PM   #14757
woodsxr
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Quote:
Originally Posted by medisyn View Post
Yeah it will only backfire once after maybe like 15 min of kickstarting. The spark plug is known to be good. This was a 2-5 kick start bike cold with no choke before I tried to "improve" it. Yesterday was hot and I tried to kick it many times after tinkering with it. I got super sweaty and lost so much water weight somebody asked me if I recently lost weight.
How do you try to start it?

You should clear the cylinder. Open the compression release and open the throttle wide open. kick the engine over 5 to 7 times. Close everyhting. find just past TDC and kick. the engine should try to start even if it has been flooded. May have to play with the choke if it doesn't start
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Old 10-02-2012, 10:02 PM   #14758
medisyn
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Quote:
Originally Posted by RZRob View Post
Consider what you did - and what you didn't. Starting the bike relies solely on the pilot circuit. I'd be seriously checking that again. Remember the atomizer holes. Also, pull the main and the emulsion tube under it and again, check those atomizer holes. Confirm the petcock is FLOWING before you go anywhere. Gas that sits turns to goo. I just got done with a new XR that sat for 10 years and the petcock was beyond repair and the carb was sketchy, but patience prevailed. Finally, if you don't follow the starting procedures - no gas - it won't start.

Also, if you messed with the float, take a common-sense look at the valve/float level.Make sure the valve actually opens.

RZ Rob
I have tried every variation of the start procedure. Each time I tried kicking 7-8 times with the throttle wide open and compression open first. I have tried choke, half and no choke. Is it possible if the float is too low the bike would not start? I have checked the petcock fuel flows out no problem. Also the bowl is getting fuel. Here is how much got out of it after shutting off the petcock and loosening the drain screw. http://i.imgur.com/nqM1o.jpg

I pulled the plug, it looked fairly normal the bike was running lean before hand which was expected. The threads looked slightly wet but the middle was bone dry and didn't look fouled. Also got a blue spark from it when kicking, so spark is working. I can smell gas in the exhaust.

I sprayed carb cleaner into the carb inlet and only got a single backfire. The bike didn't attempt to start or anything.
Also is there any sort of spec for the idle stop?

EDIT: The bike has not been sitting really. I was riding it up until I took the carb apart. The carb was 100% clean inside and didn't have any varnish inside.
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Old 10-02-2012, 11:57 PM   #14759
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oh yeah and flip the ignition to the start position too.
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Old 10-03-2012, 12:50 AM   #14760
mattymurn
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bike not starting

Quote:
Originally Posted by medisyn View Post
I have tried every variation of the start procedure. Each time I tried kicking 7-8 times with the throttle wide open and compression open first. I have tried choke, half and no choke. Is it possible if the float is too low the bike would not start? I have checked the petcock fuel flows out no problem. Also the bowl is getting fuel. Here is how much got out of it after shutting off the petcock and loosening the drain screw. http://i.imgur.com/nqM1o.jpg

I pulled the plug, it looked fairly normal the bike was running lean before hand which was expected. The threads looked slightly wet but the middle was bone dry and didn't look fouled. Also got a blue spark from it when kicking, so spark is working. I can smell gas in the exhaust.

I sprayed carb cleaner into the carb inlet and only got a single backfire. The bike didn't attempt to start or anything.
Also is there any sort of spec for the idle stop?

EDIT: The bike has not been sitting really. I was riding it up until I took the carb apart. The carb was 100% clean inside and didn't have any varnish inside.
Ok this is similar to my experience I had with my XRR this spring. I rode it one day and it was fine, the next day it would not start only backfire (reallly loud every once in a while). I must have kicked that thing 1000 times. Long story short you need 4 things to run the engine, fuel, air, spark, and compression. I had all but one (compression). Turns out my intake valves were worn down to knife edges, I still had lash but I guess there was not enough compression to start the engine. I did use a compression tester but the tests were a bit inconclusive. A leak down would tell you for sure. I took the top end apart and had the valve seats reground and had kibblewhite valves put in. When I put it back together the bike started first kick.

I hope this is not your issue , but taking the top end apart was not a big deal, a bit costly depending on what you do, ( I put new rings in at the same time and had the cylinder diamond honed)

Matthew
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