Maintenance & Technical > KX500 Original
Chain performance or lack thereof!!!
grtsctt:
I second the question posed by member SLEEZ concerning case scoring due to tight 520 o-ring chain clearance at countershaft sprocket.
SLEEZ states,
"I'm also due for a new chain, definitely an O or X ring. Did any of you have to get a spacer for the front sprocket to prevent the chain from rubbing the case?
I ask this clearance/spacer question also as i bought a junk K500 with sotck Countershaft 14 tooth sprocket that had o-ring 520 chain that ripped into case above sprocket from 10 oclock to 2 oclock respectively.
I think you must run a 15 tooth sprocket if you go with a 520 o-ring chain on K500 to avoid case-chain interference/rubbing??
Does anybody have rubbing marks?please advise
I wish to run same o-ring type chain on my 94KX250--Do I need to use a spacer or a 15 tooth sprocket to avoid interference??
Please advise--
PS I dont think there is room for spacer as no play in C sprocket, but only option is to mill sprocket or flip it if it is offcenter type.
Please answer SLEEZ and My Question and advise.
Thanks
stewart:
mine rub with a 14 sprocket and oring chian but has not caused any problems
BDI:
--- Quote from: stewart on February 20, 2008, 11:08:56 AM ---mine rub with a 14 sprocket and oring chian but has not caused any problems
--- End quote ---
Ditto, mine rubed for years on on my 1990 K-5 and has been rubing every since I built a whole new engine a couple of years ago. I just went and looked at my old cases from my 1990 the rub mark isn't even 0.5mm deep and the portion of the case that the chain rubs on is the outer area that the counter shaft bearing presses into this area is as thick as the bearing. I cannot see it causing a problem unless the rubing is extraordinary.If thats the case you have bigger problems to address
kaw rider:
or run a 87 input shaft. or input shaft mod.
KXcam22:
I didn't really have a problem but I spaced my sprocket outwards with a shim, then used a lathe to cut a same size pocket in the front side of the sprocket. This way the whole sprocket is moved outwards. I didn't worry about rear sprocket alignment and never noticed any wear. Pics in my gallery. Cam.
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