Posts
6
Joined
11/14/2017
Location
Ellenville, NY
US
rcmax64
11/25/2017 7:55am
11/25/2017 7:55am
hey all;
new to this forum,i just picked up a 96 rm250 with upgrades and extra parts pretty cheap. top end was off and was told piston skirt cracked off (which it was) and caused the engine to lockup,upon further inspection winds up the lower rod bearing must've been the culprit because there isn't any. iv'e read about the power valve,clutch(being on/off type) issues,however from much research i think the ol' girl is worth putting time and effort into.
i want to make it more for woods than mx and any advise would be greatly appreciated,i know i will never ride it to it's full potential, i weigh 145 full race gear on so if the bike is a little low on torque that won't be a problem.
i believe the bike was raced at one time because this what i got;
wer steering stabilizer
applied upper triple clamp
gold fatty bars
extra capacity fuel tank ( i don't know if it's a clark,ims or maier) and stock tank
larger radiators,werks guards,carbon engine skid,carbon pipe protector
4 fmf gold pipes ( gnarly,fatboy,and 2 fatty's) turbine, and a powercore silencers.
vforce carbon reeds,barnett basket,fmf pressure plate.
hygear tuned shock,so i'm believing that the forks where revalved also.
a bunch of radiator scoops,fenders,side plates.
stock 38 pj,165 main,50 pilot,stock needle 2nd down from top,air screw 1/2 tun out.
no porting, cylinder measured 66.42 1 inch from top.
extra trans gear set( 3rd gear drive and driven busted).
brand new artrax tires(i know they're not the best)
and other misc stuff.
the piston was a namara, but i'm not sure which one to replace it with or if i have to get the cylinder replated first.
i used to get wiseco's for my trx250r but they were steel liners.
sorry for long post, thanks,max
new to this forum,i just picked up a 96 rm250 with upgrades and extra parts pretty cheap. top end was off and was told piston skirt cracked off (which it was) and caused the engine to lockup,upon further inspection winds up the lower rod bearing must've been the culprit because there isn't any. iv'e read about the power valve,clutch(being on/off type) issues,however from much research i think the ol' girl is worth putting time and effort into.
i want to make it more for woods than mx and any advise would be greatly appreciated,i know i will never ride it to it's full potential, i weigh 145 full race gear on so if the bike is a little low on torque that won't be a problem.
i believe the bike was raced at one time because this what i got;
wer steering stabilizer
applied upper triple clamp
gold fatty bars
extra capacity fuel tank ( i don't know if it's a clark,ims or maier) and stock tank
larger radiators,werks guards,carbon engine skid,carbon pipe protector
4 fmf gold pipes ( gnarly,fatboy,and 2 fatty's) turbine, and a powercore silencers.
vforce carbon reeds,barnett basket,fmf pressure plate.
hygear tuned shock,so i'm believing that the forks where revalved also.
a bunch of radiator scoops,fenders,side plates.
stock 38 pj,165 main,50 pilot,stock needle 2nd down from top,air screw 1/2 tun out.
no porting, cylinder measured 66.42 1 inch from top.
extra trans gear set( 3rd gear drive and driven busted).
brand new artrax tires(i know they're not the best)
and other misc stuff.
the piston was a namara, but i'm not sure which one to replace it with or if i have to get the cylinder replated first.
i used to get wiseco's for my trx250r but they were steel liners.
sorry for long post, thanks,max
the water pump and cdi where something i didn't know about, that is something i will definitely look into.
is there any particular type of clutch fibers or gear oil that would help?
The Shop
i'll do that.
Avoid Namura pistons like a bad case of herpes. Lousy quality and even worse customer service.
Eric Gorr's book suggests using a Hinson basket and pressure plate along with KX plates and springs.
Kawi P/N's: fiber 13088-1105, metal plates 13089-1066, springs 92144-1351
I remember some powervalve issues on some of these 250s but can't remember what....I never had any problem.
the cylinder looks good, no gouges or scratches, the cross hatching is visible (but barely) but there isn't any wear through or ridge at the top,the piston is a namara (now a paper weight) i think the po put in an "a" sized piston which caused the destruction, i can see where there was chattering marks on the piston from rocking in the cylinder. how the po couldn't hear that is beyond me.
thanks, max
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