Re Jetting Suggestions

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imaninja
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Real Name: Evan
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My Motorcycle: 1986 GPZ 1000 Cafe Racer

Re Jetting Suggestions

#1 Unread post by imaninja » Thu Feb 02, 2017 12:30 pm

Hi everyone! I have a GPZ 900 cafe/street fighter project in which I have swapped in a 1986 GPZ 1000 engine. I've attached some pictures if you're interested!

Anyways, the engine isn't running properly. The exhaust is a custom with duel 2.25 ID glass pack mufflers. The carbs currently have K/N duel pods as show in the attached images.

Due to the modifications to the chassis and battery relocation the stock airbox will not fit. In the spring I may fabricate an aluminum intake manifold that can fit in that space which will flow air "similar" to the stock system.

So here's my 2 questions:

1) What size jets would you suggest for the new exhaust and stock airbox?

2) What size jets would you suggest for the new exhaust and the k/n pod filters?

Thanks in advance!
Attachments
cafepic2.jpg
cafepic2.jpg (118.55 KiB) Viewed 5181 times
cafepic1.jpg
cafepic1.jpg (118.75 KiB) Viewed 5181 times
kawi pods.JPG
kawi pods.JPG (44.15 KiB) Viewed 5181 times

imaninja
Rookie
Rookie
Posts: 2
Joined: Thu Feb 02, 2017 12:26 pm
Real Name: Evan
Sex: Male
Years Riding: 6
My Motorcycle: 1986 GPZ 1000 Cafe Racer

Re: Re Jetting Suggestions

#2 Unread post by imaninja » Tue Feb 07, 2017 1:15 pm

anyone?

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Gummiente
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Real Name: Mike
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Location: Kingston, ON

Re: Re Jetting Suggestions

#3 Unread post by Gummiente » Tue Feb 07, 2017 1:34 pm

You can't just throw out an accurate answer to questions like these, there are far too many variables. Start with two sizes up from stock and make sure to use a sync tool when making adjustments. You should also raise the jet needles a notch or two as well.
:canada: Mike :gummiente:
It isn't WHAT you ride,
It's THAT you ride

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