Re: Looking to buy an Airhead R90S - first time buyer
Posted: Tue Feb 21, 2023 6:17 am
Some comments:
j. -- likely the grease on the input shaft of the transmission is dry. The clutch plate is sticking and not moving freely. Even if the clutch worked OK, this is one thing you were eventually going to have to check.
k. -- the noise could either be coming from the top-of-engine crankcase breather. There is a replacement that works better. It could also be high internal pressure of the engine plenum due to excess blowby past the rings. This pressure has to escape somewhere and one place it can go is past the rear main seal. If you were to crack open the oil dipstick with engine running, the excess air would come out the hole and the quacking should go away.
l. -- wonky voltmeter could just be a bad ground for the meter.
m. -- front brake lines from the master cylinder to the calipers might be holding internal pressure because fluid can't reverse course back into master cylinder. This should be cleared by doing a fresh bleed of the brakes. The issue could also be that the pistons in the caliper are sticking and the o-ring in the piston bore is not working to pull the pistons back when pressure is released.
j. -- likely the grease on the input shaft of the transmission is dry. The clutch plate is sticking and not moving freely. Even if the clutch worked OK, this is one thing you were eventually going to have to check.
k. -- the noise could either be coming from the top-of-engine crankcase breather. There is a replacement that works better. It could also be high internal pressure of the engine plenum due to excess blowby past the rings. This pressure has to escape somewhere and one place it can go is past the rear main seal. If you were to crack open the oil dipstick with engine running, the excess air would come out the hole and the quacking should go away.
l. -- wonky voltmeter could just be a bad ground for the meter.
m. -- front brake lines from the master cylinder to the calipers might be holding internal pressure because fluid can't reverse course back into master cylinder. This should be cleared by doing a fresh bleed of the brakes. The issue could also be that the pistons in the caliper are sticking and the o-ring in the piston bore is not working to pull the pistons back when pressure is released.