3mm washer for shimming??

[cbowman78]

Hey guys,

I have been a lurker for a bit and its time to rejet the bike. I am just going to use the Keihin 100 main jets, with washers totalling .05" to start.

Is it necessary to use stainless washers so I do not have to worry about any impurities from corroded washers years down the road (Yes I am looking way ahead)?

And sorry, as your going to tell me to search... But can I use a 4mm washer as these are readily available to me. I have not found any mention of this when I have searched.

I really appreciate all responses! Thanks!

[kkim]

3mm washers or SAE #4 washers if you can find them. 4mm is too big. stainless if you can find them, but steel washers with a bit of grease on them should work fine.

stick with the 98 mains for now. change to the 100s in the future if you think you need them. bigger is not better. remove snorkel and the bike will pull from idle to redline smoothly.

http://www.ninjette.org/forums/showt...&highlight=3mm

I see from your intro thread you're installing a AP QC exhaust. Start w/ 3 shims. That worked for me when I had that setup.

http://www.ninjette.org/forums/showthread.php?t=10208

[cbowman78]

Thanks for posting kkim.

I am very new to carbs. The reason I wanted to go to the Keihin 100 mains is due to the full exhaust and removal of the snorkel. With the full exhaust should I not jump up to the 100 mains? I see that it is very common.

So if I remove the snorkel with my exhaust, I should just stay with the 98 mains and 3 washers to start? What should be the clear indicator that I need to move up a a main jet size?

I actually have the full Area P exhaust (12") on the bike now, but have a quiet core muffler on order from Kerry (And I can see why everyone says he is #1 in customer service). He was great to deal with!! The bike is just way too loud for me at the moment.

I am going to read and review the links you have attached to learn.

[kkim]

Clint,

The 98 main jets that come on a stock bike are a bit rich to begin with. When you add a free running exhaust and remove the snorkel, the added airflow that these changes bring make the 98s just about right with the added airflow. I'm not saying the 100s are not the correct jet for your bike, but the 98s are close enough to start with. I ran 98s with the setup you're moving towards and had no problems. Every bike differs as correct/proper jetting is location dependent/bike specific. At any rate, I think you'll enjoy the changes rejetting will bring.

How to select the proper main jet...
http://faq.ninja250.org/wiki/How_to_...ng#Carb_Tuning

[cbowman78]

Originally Posted by kkim

Clint,

The 98 main jets that come on a stock bike are a bit rich to begin with. When you add a free running exhaust and remove the snorkel, the added airflow that these changes bring make the 98s just about right with the added airflow. I'm not saying the 100s are not the correct jet for your bike, but the 98s are close enough to start with. I ran 98s with the setup you're moving towards and had no problems. Every bike differs as correct/proper jetting is location dependent/bike specific. At any rate, I think you'll enjoy the changes rejetting will bring.

How to select the proper main jet...
http://faq.ninja250.org/wiki/How_to_...ng#Carb_Tuning

Thanks for all the info. As soon as I get my hands on some washers, they are going in. I will update with how that turns out.

[kkim]

Originally Posted by cbowman78

Thanks for all the info. As soon as I get my hands on some washers, they are going in. I will update with how that turns out.

cool!

I'd highly recommend using some JIS screwdrivers.
http://www.ninjette.org/forums/showthread.php?t=49003

[00NissanNinja]

I'm running 2 #4 washers on the main jets and I got rid of the snorkel and my bike seems to run great. The choke even does its job now.
Ya, let us know how it goes

[kkim]

Originally Posted by 00NissanNinja

I'm running 2 #4 washers on the main jets and I got rid of the snorkel and my bike seems to run great. The choke even does its job now.
Ya, let us know how it goes

I'm sure you mean under the needles?

[00NissanNinja]

Originally Posted by kkim

I'm sure you mean under the needles?

yes lol my bike lingo not so good haha.

[kkim]

for clarity...