Britbike forum

Classic British SparesKlempf British PartsBaxter CycleBritBike Sponsor SteadfastCyclesThe Bonneville ShopLowbrow CustomsGirling Classic MotorcycleLucas Classic MotorcycleHepolite PistonsIndustrial tec supply Classic Bike Parts Cheshire

Upgrade Your membership! Premium Membership Gold Membership Vendor Membership

New Sponsor post
New FAQ post
Photos on private message
by Mal Marsden - 06/16/22 7:00 pm
Manuals on DVD - Buy 4 for 3
All 4 DVD Manual
Member Spotlight
manchester england
Posts: 132
Joined: March 2009
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Top Posters(30 Days)
reverb 80
Allan G 54
kevin 52
Top Likes Received (30 Days)
Cyborg 31
gunner 27
Newest Members
budpotter, Mark Sharp, Ian Scotland UK, cherbini, grahamsmythe
12,158 Registered Users
Who's Online Now
4 members (koncretekid, quinten, Steve Erickson, TR6Ray), 20 guests, and 16 robots.
Key: Admin, Global Mod, Mod
Forum Statistics
Most Online151
May 8th, 2022
Thread Like Summary
Allan G, Beach, Gordon Gray, SpeedyV
Total Likes: 5
Original Post (Thread Starter)
#852081 06/22/2021 1:36 AM
by Semper Gumby
Semper Gumby
Ok Im grumpy.

The 64 lightning rocket does not idle right. Specifically all warmed up and idling at a stoplight. When I pull off it dies.

The correct Monoblocks have 20 pilot jets in them.

The book says 25's.

So I'm thinking of putting 25's in and then how far open should the airscrews be?

The carbs have been resleeved by Lund so there should be no air leaks around the slide.

I've noticed that when I don't have the idle jetting right, I and other people end up compensating by opening the slides. This cause the tune to be difficult which is where I think I'm at.

Thanks in advance for your Monoblock advise.

Setting for the 389/206
Liked Replies
#852170 Jun 23rd a 01:33 AM
by Semper Gumby
Semper Gumby
Ok the 25 pilot jets are in.

Fuel height in the float bowls both match.

Carbs are sync'd.

Also I found TDC and put a degree wheel on the primary and strobed the timing - it was way off.

It starts much easier and idles really well tonight and full advance now comes up 34 degrees.
4 members like this
#852138 Jun 22nd a 06:00 PM
by Semper Gumby
Semper Gumby
Originally Posted by koan58
The usual air screw setting on Monoblocs is 21/2 turns out (of course a little +/-).

I didnt Allan. Sombody else set them up with 20's. I've got the 25's in hand. 2 1/2 turns... that i needed to know thanks.
1 member likes this
British Cycle SupplyMorries PlaceKlempf British PartsBSA Unit SinglesPodtronicVintage MagazineBritBike SponsorBritish Tools & FastenersBritBike Sponsor

© 1996-2022
Powered by UBB.threads™ PHP Forum Software 7.7.5