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Seeley Honda #SH7-672
Rob54:
--- Quote from: Zunspec on March 05, 2016, 11:00:57 AM ---I am still checking out the engine on my bike. The exhaust note is not quite right to me and the #3 cylinder is running rich (not firing every stroke ?), it seems the #3 is being a bit lazy :D.
I am curious why #3 and #1 compression readings are down on #2 and #4, although they are within the range of acceptable (just). This could be due to the long time the engine was not running so may improve with a bit more use (I have only put 150 miles on it since I got the bike). I would guess a top end re-build/service is in order but I'm not sure it essential at the moment, any thoughts on the best way ahead appreciated.
Cheers Geoff
--- End quote ---
Hello Geoff,
Just a thought but I am wondering if you have cleaned out the carbs, what with it having stood for a while, may be some rubbish or blockage in the fuel system causing the different plug colours. Number 4 seems to be running the hottest, followed by number 1, then 2 and then 3, with 1 and 2 looking about right.
Had you just taken the plugs out, as was, to check them or was it after a "plug chop"?
Oh and good luck with the magazine review, would be nice if they could include all those makers you listed.
All the Best,
Rob54.
Zunspec:
Hello Rob.
I have stripped and cleaned the carbs a couple of times, but as you suggest after such a long time without running there is always a chance some debris remains. The plugs were not subject to a full on plug chop (I have manuals which recommend 5 miles at WOT, some chance ;D) However as a general indication they are a guide. With the replacement silencers I had built I upped the main jets but I think I could go larger. They were replicas of the original Seeley silencers but are certainly louder which is a sign of being less restrictive. Overall the engine is running OK but the carbs could certainly benefit from balancing. I will need to get a set of gauges for that so any recommendations welcome.
Yes, it will be interesting to see what the Magazine chaps have in mind as I am only guessing that it it is some form of classic group test. Hope so :D
Cheers Geoff
Bryanj:
Buy the best gauges you can, the £50-60 are not up to much. There were some reasonable deals on ebay for sealy sets but all over £100
Zunspec:
A lovely day at Castle Combe race circuit 8) for the North Glos club meeting. I went to support a couple of chums who compete in the Desmo Due championship. The Seeley got loads more attention than the race bikes lol.
Giles Hepworth with his kawasaki green (?) Ducati
Cheers Geoff
SteveD CB500K0:
I had a ball at Castle Combe on my Tiger 800 a couple of weeks ago.
Do they use the "bike chicane" for the club meetings?
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