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
July 4th Sale at The Bonneville Shop
by The Bonneville Shop - 07/01/22 6:26 pm
New FAQ post
Member Spotlight
TR6Ray
TR6Ray
Illinois, USA
Posts: 2,665
Joined: May 2010
ShoutChat
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Top Posters(30 Days)
quinten 61
DavidP 57
kevin 53
Top Likes Received (30 Days)
Cyborg 23
Lannis 20
Newest Members
BrokenLeg, Jeff Keller, Steveland, Daideo, kenjon
12,210 Registered Users
Who's Online Now
6 members (Hugh Jörgen, Magnetoman, quinten, Stuart Kirk, Steve Erickson, Rich B), 12 guests, and 30 robots.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums35
Topics76,535
Posts776,186
Members12,210
Most Online204
Jul 10th, 2022
Previous Thread
Next Thread
Print Thread
#852500 06/27/21 11:47 am
Joined: May 2021
Posts: 31
Z
Z900 Offline OP
Britbike forum member
OP Offline
Britbike forum member
Z
Joined: May 2021
Posts: 31
Some people say this is not normal, to start a 500cc 1cil this easy.

Comperssion measured = 9:1

Ignition timing a bit retarded.

What do you think about this guys?


BSA on eBay
Joined: Dec 2004
Posts: 11,654
Likes: 260
Britbike forum member
Offline
Britbike forum member
Joined: Dec 2004
Posts: 11,654
Likes: 260
He is using the valve decompressor so yes if you take it to just past TDC using the decompressor then there will be no compressed gases and no resistance to kicking until the next TDC 680 or so degrees later, by which time the kick energy will be in the flywheels as inertia and will easily take it over a fully compressed TDC. Try that with a B50 and you are asking for trouble, wrong gearing on the kickstart lever, 10:1 compression and much lighter flywheels than B33.

2 members like this: BSA_WM20, Z900
Joined: Oct 2008
Posts: 1,736
Likes: 11
L
Britbike forum member
Offline
Britbike forum member
L
Joined: Oct 2008
Posts: 1,736
Likes: 11
I can start my B44R that easily.

Last edited by LarryLebel; 06/27/21 3:08 pm.
2 members like this: Allan G, Z900
Joined: Apr 2021
Posts: 67
Likes: 3
N
Britbike forum member
Offline
Britbike forum member
N
Joined: Apr 2021
Posts: 67
Likes: 3
That's how I start mine from cold:
On centre stand
Petrol on
1/2 retard
air lever nearly closed
tickle carb (hot or cold)
take piston over centre gently
long 'swing' on kickstart (with a pair of Goldtops, not flip-flops!)
Starts first or second swing.

Joined: Dec 2018
Posts: 266
Likes: 37
Britbike forum member
Offline
Britbike forum member
Joined: Dec 2018
Posts: 266
Likes: 37
If you have the bike set up properly with decent ignition, a carb that isn't a clapped out pos, and proper technique, then why wouldn't it start like that?

An old mechanic, many years ago, told me engines want to run, that is their purpose, you don't have to MAKE them run. If they aren't running, then you just have to find out what is stopping them from doing what they want to do.


Moderated by  Allan G, Jon W. Whitley 

Link Copied to Clipboard
British Cycle SupplyMorries PlaceKlempf British PartsBSA Unit SinglesPodtronicVintage MagazineBritBike SponsorBritish Tools & FastenersBritBike Sponsor






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