RM 250 Motor Problem - Motorcycle-Journal Forums

MCWayne · 01-07-2004, 04:06 AM

Hi Guys / Gals,
Own a 2001 model RM 250. Was out on the track recently and a weird grinding sound came from the engine after a full-on start, slowed down and was able to get back to the pits. Restarted the engine and then came a knocking sound. The engine doesn't seem to have lost any compression, and after taking the spark plug out, there isn't any metal residue. I don't think it has thrown a piston ring? Will be pulling it down this weekend and checking all I can. I was thinking of checking the least major stuff first, eg: Clutch and power valve? Any thoughts from anyone out there would be greatly appreciated. Are the RM engines strong or were there any faults that may need a boost?

Cheers
Wayne (Australia)

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MCWayne · 01-10-2004, 04:46 PM

Don't worry guys it was the main cranshaft bearings
Cheers
MC

The Chad · 01-10-2004, 05:00 PM

I read this but you had responded to quickly, As soon as I read your post I knew that is what went wrong. I hope you get her back in ars kicken condition, get back on the track.

dirtyp · 09-07-2005, 02:10 PM

I just replace mine on a 2002 rm250. It wasnt hard at all. Good luck

01-07-2004, 04:06 AM	#1 (permalink)
MCWayne Newbie Joined: Jan 2004 Posts: 2	RM 250 Motor Problem Hi Guys / Gals, Own a 2001 model RM 250. Was out on the track recently and a weird grinding sound came from the engine after a full-on start, slowed down and was able to get back to the pits. Restarted the engine and then came a knocking sound. The engine doesn't seem to have lost any compression, and after taking the spark plug out, there isn't any metal residue. I don't think it has thrown a piston ring? Will be pulling it down this weekend and checking all I can. I was thinking of checking the least major stuff first, eg: Clutch and power valve? Any thoughts from anyone out there would be greatly appreciated. Are the RM engines strong or were there any faults that may need a boost? Cheers Wayne (Australia) [/b]

01-10-2004, 04:46 PM	#2 (permalink)
MCWayne Newbie Joined: Jan 2004 Posts: 2	Found IT Don't worry guys it was the main cranshaft bearings Cheers MC

01-10-2004, 05:00 PM	#3 (permalink)
The Chad Site Wrench Head Joined: Nov 2003 Bike: crashed Location: Duncan B.C. Posts: 635	I read this but you had responded to quickly, As soon as I read your post I knew that is what went wrong. I hope you get her back in ars kicken condition, get back on the track. __________________ A truly wise man asks more questions than he answers, I think I must be retarted

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09-07-2005, 02:10 PM	#4 (permalink)
dirtyp Newbie Joined: Sep 2005 Bike: 2002 RM250 Location: Maryland, but I am from GA. Posts: 5	I just replace mine on a 2002 rm250. It wasnt hard at all. Good luck

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