07-01-18, 01:22 AM
Well it has been a while since I looked at the C90, had the carb off and cleaned it out, the carb is in very good ,condition but was really dirty inside, squeaky clean now though in and out. Made up a maintenance petrol tank as I did not want to put clean fuel in the C90 petrol tank until it has been thoroughly clieaned out.
Found a bit of a problem with the bike, I thought to start with that the engine was partly siezed on kicking it over the engine did not spin over as I would have expected, but felt strangely tight as if the piston was tight in the bore. I removed one of the tapper covers and kicked her over again and the tapper just nodded, and did not compress/open the valve at all.
Now I am feeling rather pissed off, looking like there are fairly serious issues with this lump, valves not opening engine refusing to turn over properly,I thought I would check the compression, plug out, finger over plug hole, push the kick starter down buy hand and could feel some compression but not much as the thing still was not turning over properly.
Stood up and in my frustration was rather harsh on the kick starter and gave it a hard shove down and the motor spun over as Inwould of expected it to, thought to myself something had freed off plug back in and the bloody thing feels as if it semi seized again, plug out and she spins over rapidly..WTF is going on?
Quick search on the net came up with lots of hits saying it is 100% the clutch that's gone, one hit explained that the centrifugal clutch is slipping and not overcoming the compression of the engine and that is why the motor spins over fine with the spark plug out.
He recommended leaning the bike hard over to the left, almost on its side and try kicking it over with the plug in, this I did and the bike started on the third kick, it ran sweet as a nut after the first juddering coughs, bike back upright again on the stand and she is ticking over great. Switched the bike off and it refused to start again until I laid it over again.
This is the symptom according to the guys explanation of a fucked centafugal clutch. He said often the bike being left for a long period allows the plates to stick together and if the bike is low on oil (which it was, it did not show on the dipstick even with it screwed in) the plates can dry out and the lining material can shrink and start to tear off when it's kicked over.
Methinks the guys knows what he is talking about, he discribed exactly what was happening and how to start the bike by laying it down after topping the oil up.
New plates about £18.00 plus the same for a complete engine gasket set, aparantley engine out about 30 to 40 minutes and the plate replacement takes about 30 minutes he said the hardest part is cleaning the old gasket off the two mating case faces.
I love it when a plan comes together. Thumbs up for the Web, such a useful resource.
Engine was coming out anyway for a complete bodywork makeover.
Found a bit of a problem with the bike, I thought to start with that the engine was partly siezed on kicking it over the engine did not spin over as I would have expected, but felt strangely tight as if the piston was tight in the bore. I removed one of the tapper covers and kicked her over again and the tapper just nodded, and did not compress/open the valve at all.
Now I am feeling rather pissed off, looking like there are fairly serious issues with this lump, valves not opening engine refusing to turn over properly,I thought I would check the compression, plug out, finger over plug hole, push the kick starter down buy hand and could feel some compression but not much as the thing still was not turning over properly.
Stood up and in my frustration was rather harsh on the kick starter and gave it a hard shove down and the motor spun over as Inwould of expected it to, thought to myself something had freed off plug back in and the bloody thing feels as if it semi seized again, plug out and she spins over rapidly..WTF is going on?
Quick search on the net came up with lots of hits saying it is 100% the clutch that's gone, one hit explained that the centrifugal clutch is slipping and not overcoming the compression of the engine and that is why the motor spins over fine with the spark plug out.
He recommended leaning the bike hard over to the left, almost on its side and try kicking it over with the plug in, this I did and the bike started on the third kick, it ran sweet as a nut after the first juddering coughs, bike back upright again on the stand and she is ticking over great. Switched the bike off and it refused to start again until I laid it over again.
This is the symptom according to the guys explanation of a fucked centafugal clutch. He said often the bike being left for a long period allows the plates to stick together and if the bike is low on oil (which it was, it did not show on the dipstick even with it screwed in) the plates can dry out and the lining material can shrink and start to tear off when it's kicked over.
Methinks the guys knows what he is talking about, he discribed exactly what was happening and how to start the bike by laying it down after topping the oil up.
New plates about £18.00 plus the same for a complete engine gasket set, aparantley engine out about 30 to 40 minutes and the plate replacement takes about 30 minutes he said the hardest part is cleaning the old gasket off the two mating case faces.
I love it when a plan comes together. Thumbs up for the Web, such a useful resource.
Engine was coming out anyway for a complete bodywork makeover.