Does anyone know if I need to rejet the carb on an eton viper 90r if I take out the restrictors and add a uni filter, or do I just readjust the carb?Also wondering why my transmission won't engage after going through water on my 2004 polaris 700twin 4x4. Any help is appreciated. I am new to Quad riding and not very knowledgeable on the subject.

 

Yes you will have to re-jet the carb on that 90. And the transmission wont engage cause the belt inside it wet and slipping.

 

What restrictors are you talking about?....Yes you will have to rejet if add a uni..We went from the stock 85 to a 115..

 

Thanks for info. hopefully a new belt cover gasket, solves the issue.

 

Where did you get the 115, and it looks like it made a tremendous difference from the picture. At one of the eton sites, I saw sizes #80 thru #90. Also did you have to put on an aftermarket pipe or did you just take out the restrictor washer and spark arrestor? Thanks for your help.

 

I bought the UNI from hetrick's and they gave me 3 jet sizes to try with it(100,110,115)..The bike would only go about a lenght of itself and then had a huge bog with the factory jetting after adding the UNI...Doing this by itself does not make a big difference in performance..It was more or less something I wanted to try..I also added boyeseen reeds and some lighter clutch wieghts to help with acceleration..It's not a huge difference but it does accelerate much better...Otherwise the engine and pipe are stock..There is no restrictor washer on the Etons that I have ever heard of..Our's is a 2004 so it does not have a removable spark arrestor..The good news is it doesn't seem to plug up like the removable ones either.

 

Thanks for all the info. On the eton 90 I found a restrictor washer at the head of the exhaust, its hard to see so take the exhaust all the way off, it's probably stuck and blackened. Also I adjusted the cdi box from 4 to 6. Just those 2 changes made quite a difference. I have yet, to rejet and add a Uni filter! I also took out the spark restrictor, because when those get clogged it's over, I couldn't even start the quad.