Search found 5 matches

by Dust&
17 Jul 2018 19:09
Forum: 09. Engines
Topic: New member - need advice on tuning TB42s
Replies: 12
Views: 18433

Re: New member - need advice on tuning TB42s

I will do some more research and play around with the timing a bit more. The missing O ring could be significant! Could explain why I need 4-5 turns out to get max rpm. Should have one that fits amongst my bike parts. Does it fit up against the washer or where the needle meets the thread? Thanks for...
by Dust&
17 Jul 2018 16:40
Forum: 09. Engines
Topic: New member - need advice on tuning TB42s
Replies: 12
Views: 18433

Re: New member - need advice on tuning TB42s

Hi Peter I checked the TDC and it is spot on, mark is at 0 when no.1 piston is at top of compression stroke. Not really sure why it needs so much advance then? If the chain stretches over time you need to advance a little to compensate but not 10 degrees! Anyway, any other ideas? As for the carb, I ...
by Dust&
15 Jul 2018 21:35
Forum: 09. Engines
Topic: New member - need advice on tuning TB42s
Replies: 12
Views: 18433

Re: New member - need advice on tuning TB42s

Thanks Peter, that is very helpful. The big vacuum hose from the branch was plugged with a screw and the small vacuum hose from the branch to the vacuum solenoid was missing! Got that sorted out now, just need to replace the left side hose from the altitude compensator as it has been cut and plugged...
by Dust&
14 Jul 2018 23:24
Forum: 09. Engines
Topic: New member - need advice on tuning TB42s
Replies: 12
Views: 18433

Re: New member - need advice on tuning TB42s

Hi Peter thank you for the info and your kind offer. I will try and source a full carb rebuild kit if I can but if not would very much appreciate any spare gaskets and an air mixture screw. As for your question, the vacuum hose leading from the vacuum advance on the distributor is connected to the c...
by Dust&
13 Jul 2018 15:57
Forum: 09. Engines
Topic: New member - need advice on tuning TB42s
Replies: 12
Views: 18433

New member - need advice on tuning TB42s

Hi All, I recently picked up a Y60 TB42 carb model and have picked up a few gremlins that I would welcome some advice on. I started by doing a basic service (spark plugs, air filter, oil & filter, cleaned out and tested pcv valve and hoses). I have been trying to tune the engine and have found t...

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