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MX, SX & Off-Road Discussions
General Moto | Off-Topic Posts
XR600R vs. XR650L
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[QUOTE="motometal, post: 681786, member: 24727"] I was told once that the clutch on the L has a cush drive built into it (which isn't fitted on the other models). Since I haven't ever had it apart, I can't confirm this. Regarding the countershaft spline problem, I bet in almost every case you will find that someone has fit a cheap aftermarket countershaft sprocket, which (due to poor or no heat treatment) quickly starts to loosen up and wear out on the spline, then it proceeds to wear the countershaft itself. My bike had this problem, but I caught it in time, but had to reverse the sprocket and shim it up to engage the inboard section of spline that isn't worn. On the stock L carb, needle adjustability isn't that bad-just shim it up! That being said, I think there is another problem with the needle. I suspect the diameter needs to be a bit smaller to allow richer mixture at low throttle openings. There seems to be a lean spot between idle (fuel screw) and half throttle (needle clip/level). Richening up the fuel screw won't cure the problem. Has anyone experimented with the cam mechanism that forces the slide open? With a flat top piston, DG rcm exhaust, and all the usual uncorkings and jetting, my bike runs pretty good but still has a bog if you goose the throttle at low rpms. I suspect a different diameter needle may help, but a pumper carb is probably the REAL solution. Otherwise, at higher RPMs and/or conservative throttle openings, throttle response is quite startling, considering we are talking about the Buick Electra equivalent of the dirt bike world (4" bore!) fitted with a CV carb! Regarding the suspension, it's pretty crude but can be made to work fairly well, the weak spot on mine is whoops or stutter bumps-that's where modern suspension technology has a real edge. With stock springs and minor adjustments, the L can handle some pretty big jumps. Mine now has a lowering link, which works great for street or racing on paved courses. The $100 was a bit steep, but to me it was worth it (mine is the '93 model which had an even taller seat ht. than the other year models'). I haven't tried any large jumps since the link was installed because now the front of the bike has been lowered and it would bottom out on the fender. Stock, the rear spring is very stiff and the forks are soft. Sorry the thread got off track here, lots of good specific discussion. I'm sure other owners of the L can relate that it's a big, heavy, tall, underpowered pig, but for some reason with 4 bikes in the garage I have feelings for this bike unlike the others. It's just a great bike! Not an ideal bike for any one purpose, but way more flexible than most. People complain about the small fuel tank, because they are having so much fun they don't want to stop riding! [/QUOTE]
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Forums
MX, SX & Off-Road Discussions
General Moto | Off-Topic Posts
XR600R vs. XR650L
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