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 First start up!

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1bantamcloser2divorce

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Number of posts : 36
Localisation : Vancouver Island, CANADA
Registration date : 2009-10-06

PostSubject: First start up!    Tue Aug 14, 2012 8:55 am

After two and a half years of collecting parts I fired my engine up for the first time yesterday, very satisfying and noisy and smokey. Had the neighbour across the street close to calling the fire dept. Strangely, the wife wasn't as excited as I was.

It is a 1955 D3 with a ported barrel, Mikuni VM30 carb and an expansion chamber.

It is running far too rich at the moment. Could anyone suggest a starting point for VM30 jetting?

Also I would like to take the (factory) head in to a machinist to get the head skimmed. I have seen heads machined to flat. What would be good starting point without affecting reliability too much?

Wheels next!


[img][/img]

Cheers,

Andy
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ted

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Number of posts : 184
Registration date : 2007-08-23

PostSubject: Re: First start up!    Thu Aug 16, 2012 6:37 am

Well done Andy Your photo did not show whole bike but an I right in thinking it will be a plunger frame?
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1bantamcloser2divorce

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Number of posts : 36
Localisation : Vancouver Island, CANADA
Registration date : 2009-10-06

PostSubject: Re: First start up!    Thu Aug 16, 2012 10:03 am

No, it is a rigid frame Making it all the more "collectable"!
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alan
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Localisation : Mexborough
Registration date : 2006-12-01

PostSubject: Re: First start up!    Thu Aug 16, 2012 6:37 pm

Hi Andy,
If you are not using a "powerjet" on the VM30 then start about 280 or 290 mainjet and work down from there.
Powerjet is definately preferred as you will get a better overall balance.
If using a powerjet then start with 200 main jet and 80 or 90 power jet.
Expect the bike to run rich initially, and as always take great care when changing jetting.
Hope this helps
Alan
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john bass

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Number of posts : 1737
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Localisation : Bensberg, Germany
Registration date : 2006-12-06

PostSubject: Hmmm!?   Fri Aug 17, 2012 6:01 am

Rigid frame!?
Often thought that a good idea because road race tracks are fairly smooth
and for sure youŽd feel what the back wheel is doing. I donŽt think I ever
got my suspension back and front "optimum". At least trying the back end
"solid" might be a way to go before fitting rear spring units.

Good luck with your efforts Andy,

Cheers!
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1bantamcloser2divorce

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Number of posts : 36
Localisation : Vancouver Island, CANADA
Registration date : 2009-10-06

PostSubject: Re: First start up!    Mon Aug 20, 2012 11:50 am

Thanks for the encouraging words! Definatley enjoying this project (most of the time).

Cheers,

Andy
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First start up!
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