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Much cooler downpipe

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moizeau
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Posts: 744
Joined: 3rd May 2019
Location: France

Re: Much cooler downpipe

#16 PostAuthor: moizeau » Fri Aug 15, 2025 2:52 pm

Got it almost back together, all shimmed up, just waiting on a cam cover gasket.
Couldn't resist doing a compression test on No.2 140psi. much better than 50. :D
Pete

moizeau
Custard Cream
Custard Cream
Posts: 744
Joined: 3rd May 2019
Location: France

Re: Much cooler downpipe

#17 PostAuthor: moizeau » Wed Aug 20, 2025 5:27 pm

Gasket turned up yesterday so that was fitted along with RTV for cam cover halves.
Chucked the tank on, prime for 20 secs, full choke, started 'quart de tour' as we say in French. Checked the temps of the downpipes and No.2 now gets as got as the rest.
Tank back off tomorrow evening to redo the mixture on N'2 and redo the sync. I'm sure they will be out due to the open valve.
Happy so far......
Pete

moizeau
Custard Cream
Custard Cream
Posts: 744
Joined: 3rd May 2019
Location: France

Re: Much cooler downpipe

#18 PostAuthor: moizeau » Sat Aug 23, 2025 12:38 pm

Couldn't really see the colortune due to sunlight but did a sync.
No 2 had risen 6cm. Levelled that off with No.1 then had to bring 1/2 down 3cm to match 3/4 lifting the idle as I went to stop it stalling.
I starts very well, no popping at all on choke and very steady cold or hot.
Went for a quick blat down the lane, blimey, it's like a new bike. Not surprising really since it has gained 1/2 a cylinder and blocking the clean air cobblers can't hurt.
Very pleased indeed.
Pete


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