06-09-2020, 06:07 PM
I have similar problems with two different engines in the Tourer.
Putting those aside for the moment, I have been reminded of the engine I used for a JoGLE run, which didn't want to perform as it should.
I had treated it to a re-ground crank and re-metalled big ends.
Eventually,somewhere near Edinburgh, I found one big end tighter than it should be.
A thin silver paper shim solved the problem.
I think the problem on one of the Tourer engines is excessive friction caused by patent oil control rings.
The lesson is: a little extra friction somewhere can make an engine feel sluggish.
Putting those aside for the moment, I have been reminded of the engine I used for a JoGLE run, which didn't want to perform as it should.
I had treated it to a re-ground crank and re-metalled big ends.
Eventually,somewhere near Edinburgh, I found one big end tighter than it should be.
A thin silver paper shim solved the problem.
I think the problem on one of the Tourer engines is excessive friction caused by patent oil control rings.
The lesson is: a little extra friction somewhere can make an engine feel sluggish.