headsmess
Miniriders OG
wow, my first post in...um... a long time!
ok, no compression.
all this talk about clutches... could be chasing wild geese around the paddock?
first...pull the spark plug out. kick it over. does it go "woof woof" out the hole? is there spark? that will give you an idea if its simply the clutch slipping, or, as mentioned earlier...if its a valve issue. or you could take the caps off the valves and see if they are actually moving as expected. you gotta make sure the engine is actually turning over before blaming the clutch!
cus theres a whole lot of issues you may have, you gotta eliminate each and every one.
it starts (apparently?). but makes a horrible noise. so, theres a possibility that the cam chain tensioner is bust, and it may have jumped a tooth or two on the cams.
you said you looked at the rings...have you synched/timed the cams properly when you put it all back together? or retensioned the chain tensioner properly? and YES, the tensioner REQUIRES OIL. its sort of hydraulic...
it could be the kickback arrestor on the camshaft holding the exhaust valve open. i usually tear the things off, kickback doesnt bother me as i know how to start my bike(s) properly
the knocking noise could be the main bearings, they can sound freaking awful...did i see a mention of running it with no oil? same deal goes with rod bearings. the knocking could be one of the bearings collapsed, the piston smacking around like a...like a... meh. something to check.
it could be that kickback arrestor, has let the exhaust valve hit the piston, bent it, and nothing except replacing it will get it to seal again... remove the head. clean the chamber. fill it with some kero. leave it overnight. any signs of kero in the ports... think about replacing the valves. they may just need a re-grind.
just looking at the rings is no good... the bore might be glazed, which could be fixed with a simple honing, and getting a new set of rings... even if they do look a-ok, theyre cheap, and easy to replace.
and, if it is the clutch... maybe its stripped its splines out... it would just spin on the crankshaft then, which isnt going to do very much... except make nasty noises, mostly.
and, while talking clutches... plates? any missing teeth?
sorry if some of the things ive mentioned arent the issue...i just ramble
ok, no compression.
all this talk about clutches... could be chasing wild geese around the paddock?
first...pull the spark plug out. kick it over. does it go "woof woof" out the hole? is there spark? that will give you an idea if its simply the clutch slipping, or, as mentioned earlier...if its a valve issue. or you could take the caps off the valves and see if they are actually moving as expected. you gotta make sure the engine is actually turning over before blaming the clutch!
cus theres a whole lot of issues you may have, you gotta eliminate each and every one.
it starts (apparently?). but makes a horrible noise. so, theres a possibility that the cam chain tensioner is bust, and it may have jumped a tooth or two on the cams.
you said you looked at the rings...have you synched/timed the cams properly when you put it all back together? or retensioned the chain tensioner properly? and YES, the tensioner REQUIRES OIL. its sort of hydraulic...
it could be the kickback arrestor on the camshaft holding the exhaust valve open. i usually tear the things off, kickback doesnt bother me as i know how to start my bike(s) properly
the knocking noise could be the main bearings, they can sound freaking awful...did i see a mention of running it with no oil? same deal goes with rod bearings. the knocking could be one of the bearings collapsed, the piston smacking around like a...like a... meh. something to check.
it could be that kickback arrestor, has let the exhaust valve hit the piston, bent it, and nothing except replacing it will get it to seal again... remove the head. clean the chamber. fill it with some kero. leave it overnight. any signs of kero in the ports... think about replacing the valves. they may just need a re-grind.
just looking at the rings is no good... the bore might be glazed, which could be fixed with a simple honing, and getting a new set of rings... even if they do look a-ok, theyre cheap, and easy to replace.
and, if it is the clutch... maybe its stripped its splines out... it would just spin on the crankshaft then, which isnt going to do very much... except make nasty noises, mostly.
and, while talking clutches... plates? any missing teeth?
sorry if some of the things ive mentioned arent the issue...i just ramble
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