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Does anyone know if Honda supply different size valve shims for the CBR250RR so that valve clearances can be set accurately? If so - where can I get hold of them?
Any bike shop should have them, best bet would be to go to a Honda one though, they're a 7.5mm shim available in different thickness.lordmoonpie said:Does anyone know if Honda supply different size valve shims for the CBR250RR so that valve clearances can be set accurately? If so - where can I get hold of them?
Thanks Mitchkip - I'll give the local dealer a try then! I will need shims as I'm having the cams re-ground for better performancemitchkip said:Any bike shop should have them, best bet would be to go to a Honda one though, they're a 7.5mm shim available in different thickness.
Some shops are scum when it comes to shims though and will try to charge you like $15 swap fees, bunch of pricks. Last I heard they're about $6 a piece from Honda
Have you done a dyno run before pulling the cams out to get a before graph to make comparisons to? Will be interesting to see if this actually makes a difference.lordmoonpie said:Thanks Mitchkip - I'll give the local dealer a try then! I will need shims as I'm having the cams re-ground for better performance![]()
I'm more interested in what profile/timing/overlap/lift was used, how it was re/ground and by whom.banana.logic said:Have you done a dyno run before pulling the cams out to get a before graph to make comparisons to? Will be interesting to see if this actually makes a difference.lordmoonpie said:Thanks Mitchkip - I'll give the local dealer a try then! I will need shims as I'm having the cams re-ground for better performance![]()
also good luck.
Well if there's interest in it then sure I'll post up as it happens/ The cams go off today so will be about 4 weeks. There's no chance of doing a before dyno run as the engine was a non-runnign donor. Looked to me like the water pump had seized but everything else appears to be in good order.banana.logic said:Can we get a full write up of what was done and what results you get please?
Please don't take this as trying to talk you out of doing this.lordmoonpie said:Well if there's interest in it then sure I'll post up as it happens/ The cams go off today so will be about 4 weeks. There's no chance of doing a before dyno run as the engine was a non-runnign donor. Looked to me like the water pump had seized but everything else appears to be in good order.banana.logic said:Can we get a full write up of what was done and what results you get please?
The crank is also going off this week for lightening and balancing. I want this motor to hit 20,000 rpm and give me more top end power. I guess it'll be fractions more but I kinda like these interesting "what if" exercises...
Humbug said:I'm more interested in what profile/timing/overlap/lift was used, how it was re/ground and by whom.banana.logic said:Have you done a dyno run before pulling the cams out to get a before graph to make comparisons to? Will be interesting to see if this actually makes a difference.lordmoonpie said:Thanks Mitchkip - I'll give the local dealer a try then! I will need shims as I'm having the cams re-ground for better performance![]()
also good luck.
I would like to see that also. Who does the grind?