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Jetting question for my z400

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jobbo
90cc 2 stroke / 110 4 stroke


Joined: 15 Jan 2012
Posts: 51
Location: newcastle

PostPosted: Wed May 09, 2012 7:09 pm Post subject: Jetting question for my z400 Reply with quote Back to top

Hey guys,

I'm a little stumped I've got a 2003 ltz400 with a cylinder works 434 big bore, stage one hot cams, full rossier exhaust, dyna tech cdi, dynojet kit
Pro design foam filter, no airbox lid

I had the bike with a slip on exhaust and rejetted but know I think the jet size will be to small I have a 150 main in it

Any thoughts would be great thanks

Jai
 
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ATC250RG
90cc 2 stroke / 110 4 stroke


Joined: 29 Dec 2008
Posts: 75
Location: Newcastle

PostPosted: Wed May 09, 2012 7:59 pm Post subject: Re: Jetting question for my z400 Reply with quote Back to top

jobbo wrote:
Hey guys,

I'm a little stumped I've got a 2003 ltz400 with a cylinder works 434 big bore, stage one hot cams, full rossier exhaust, dyna tech cdi, dynojet kit
Pro design foam filter, no airbox lid

I had the bike with a slip on exhaust and rejetted but know I think the jet size will be to small I have a 150 main in it

Any thoughts would be great thanks

Jai


Take it to Jim Sherrits and get in dynoed, then it will be correct, otherwise it's just a guess
 
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Jason
50cc nipper


Joined: 01 Apr 2009
Posts: 15

PostPosted: Thu May 10, 2012 10:30 pm Post subject: Reply with quote Back to top

U could try reading the plug and throttle response. It should be a nice chocolate brown. Go get some jets in different sizes then go for a ride, check plug and if it's dark go down in size or light and go up in size.
 
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