Re Jetting Suggestions

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imaninja
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Real Name: Evan
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Years Riding: 6
My Motorcycle: 1986 GPZ 1000 Cafe Racer

Re Jetting Suggestions

#1 Unread post by imaninja »

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!
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cafepic2.jpg
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cafepic1.jpg
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kawi pods.JPG
kawi pods.JPG (44.15 KiB) Viewed 18929 times

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

Re: Re Jetting Suggestions

#2 Unread post by imaninja »

anyone?

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Gummiente
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Joined: Wed May 11, 2005 11:34 pm
Real Name: Mike
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Years Riding: 38
My Motorcycle: 03 Super Glide
Location: Kingston, ON

Re: Re Jetting Suggestions

#3 Unread post by Gummiente »

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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