shercoman2k8 Posted November 30, 2009 Author Report Share Posted November 30, 2009 Would be good if you could summarize....1. The symptoms of your fault 2. The cause(s) of the problem 3. What did you learn or uncover along the way. Best of balance. Neo Yes, of course... completely forgot. 1. Symptoms - The bike was constantly going from rich to lean, bogging out whilst riding however much you leaned it off, bogged on the throttle opening despite occasionaly having it so lean it would knock. Setting it correctly was almost impossible. Also, once the throttle was blipped it was taking a long while to return to a normal idle speed, normally about 2 seconds, it was taking upwards of 8. Gearbox oil leaking from the crank case breather. When tested, by putting the overflow hose into a bucket of water, I found that bubbles were produced, meaning it was under pressure. 2. Cause - Turned out to be the crank seals that needed replacing. The seals that were in the bike were the black Nitrile ones, with the help from this forum we established that the Nitrile seals cant handle alcohol laced fuel. Replaced with the brown, Viton seals. 3. The black nitrile seals go hard with our fuels due to the alcohol content. All Sherco's seem to be using different seals. The crank case on the 250 and 125 is very different. The jitsie filters decompose and block carbs. As per your problem I beleive. Oh, and the best way to get those gears off, a home made puller. Will explain this later! Quote Link to comment Share on other sites More sharing options...
neo Posted November 30, 2009 Report Share Posted November 30, 2009 Oh, and the best way to get those gears off, a home made puller. Will explain this later! Yes please do.....as I'd like to compare that against my WD method of using a steel Jubilee Clip and a long screw driver ...I'm laughing but I am serious too.....it worked a treat and left no marks. Best of balance. Neo Quote Link to comment Share on other sites More sharing options...
shercoman2k8 Posted November 30, 2009 Author Report Share Posted November 30, 2009 Well, it was an old pedal cage from a push trials bike. Bent over so the ends can grip under the edge of the gear and at the right distance apart for the gear. I put a nut either side of a hole in the cage and threaded a bolt through it and let it push against the shaft... Wound the bolt round with a socket and it was off in seconds. Quite effective. Will get pictures later! Quote Link to comment Share on other sites More sharing options...
neo Posted November 30, 2009 Report Share Posted November 30, 2009 Will get pictures later! WOW...I can't wait to see it Best of balance. Neo Quote Link to comment Share on other sites More sharing options...
shercoman2k8 Posted November 30, 2009 Author Report Share Posted November 30, 2009 (edited) Here she is! did the job well. Excuse the crap webcam pictures. Edit: Out of shape as it has to be bent to apply/remove to/from the gear. Edited November 30, 2009 by shercoman2k8 Quote Link to comment Share on other sites More sharing options...
neo Posted December 1, 2009 Report Share Posted December 1, 2009 Holly Moses....that's awesome....I love it Best of balance. Neo Quote Link to comment Share on other sites More sharing options...
copemech Posted December 1, 2009 Report Share Posted December 1, 2009 Holly Moses....that's awesome....I love it Best of balance. Neo Yea, quite resourceful! If it works, use it! He does seem to have his stuff together at times! Notice the well groomed fingernails and cuticles! It is obvious he has found out about girls! Quote Link to comment Share on other sites More sharing options...
b40rt Posted December 1, 2009 Report Share Posted December 1, 2009 Yea, quite resourceful! If it works, use it!He does seem to have his stuff together at times! Notice the well groomed fingernails and cuticles! It is obvious he has found out about girls! Hasn't worked out how to use a venetian blind however, unless it's a signal to the "girls" Quote Link to comment Share on other sites More sharing options...
shercoman2k8 Posted December 1, 2009 Author Report Share Posted December 1, 2009 Hasn't worked out how to use a venetian blind however, unless it's a signal to the "girls" I have ummm... Squint windows! No excuses, im a lazy bum who doesnt bother sorting his blinds Quote Link to comment Share on other sites More sharing options...
b40rt Posted December 1, 2009 Report Share Posted December 1, 2009 I have ummm... Squint windows! No excuses, im a lazy bum who doesnt bother sorting his blinds Liked the solution to the puller, bush mechanic thinking. Quote Link to comment Share on other sites More sharing options...
shercoman2k8 Posted December 7, 2009 Author Report Share Posted December 7, 2009 So... Seems like this thing doesn't like the oil I use! Was out training with a few locals down in Kinlochleven on Saturday and took a nasty bail on a splatter, bike fell onto its side and has put a nice hole right through the clutch cover. New one on its way! Whilst im here however, I have another question to ask... How do I set the float level on the Keihin? I appear to constantly be p***ing fuel out of the overflow! Put a pipe from the overflow to alongside the bowl, and it's about 5mm above where i'd expect it to cut off. Cheers guys! Quote Link to comment Share on other sites More sharing options...
copemech Posted December 7, 2009 Report Share Posted December 7, 2009 First off, which tube is it p***ing from? If it is the one that comes off the lower part of the bowl you simply need to block it off. It is useless at this angle of installation. Other than that, you have to hold the carb body at about a 45 deg.angle to determine exactly when the floats contact the needle without compressing the spring, as this is your actual point of shutoff, and the floats should be near in level with the carb body to achieve the 19.5 mm spec to the top of the floats from the body. Quote Link to comment Share on other sites More sharing options...
shercoman2k8 Posted December 7, 2009 Author Report Share Posted December 7, 2009 First off, which tube is it p***ing from? If it is the one that comes off the lower part of the bowl you simply need to block it off. It is useless at this angle of installation. Ahh right... That solves a fair few of my problems then! Thought it was perhaps the float level set wrong, not allowing the fuel to be shut off... but if its normal then no bother! Cheers! Quote Link to comment Share on other sites More sharing options...
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