hi people i just wondred if anyone has had a similar problem or knows what this is i recently rebuilt the top end of my crm

and now there is a ratteling comming from the engin it seems to be from the power valve ive had it to bits again and can see
nothing obvious is there some thing im missing in rebuilding the power valve seems to run fine apart from this ??

please help this is driving me mental lol

thanks jez

Probably, removing the carbon has now allowed it to work, and rattle around a bit.
Take the side cover off and check it's operating within, normal, parameters
Mike

yea i done all that but the noise is still there and the valve has allways worked

it is quite audible at low revs and is increasing with the revs also altho the sound seems to quieten when reved


ps . on the right hand side in line with the powervalve is a hex bolt of some sort what is it for ?

so after reading this forum for like hours

i have the same wossner piston and bearings as i see othres have used

by cross refrencing part numbers ect i seem to have all the right bits in place

but still this drrrrrrrrrrrrrrrrrrrrr noise


ps : does no one know what this hex bolt on the right hand side of the barrel is for inline with the powervalve ???????????????????

Don't know what the hex head bolt is for but it might be a cover for some machining that was done to the cylinder .

I have recently put a rebored barrel and piston onto my bike. It is more rattly than the other that I had on before and I've been over it in much the same way as I suspect you have. Beyond the issue of whether you have lost the little collar that goes on the 'non-lever' end of the PV shaft, all I can suggest is that some barrels are noisier than others, especially after they have been decarbonised .

ok thanks

im just paranoid i guess this noise was not there pre rebilid

whitch makes me question it

as u would

im not a rich man but love my crm it has taken me to work and home and allot more for some 2 years now and allot of off road mountain climbs in nz i want it to run a few more

thanks tho im going to keep trying to work this out think ill strip it down again and go step by step and see if i cant eliminate





ps does anyone know where ot get the exust gasket from cant seem to get one here in new zealand

mine came from leisuretrail here in the uk, but try your local honda dealer with the part number 18291-KAE-870 and they may be able to get one for you