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120 bore kit

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what is better a 120 bbr big bore kit or one from xr100.com? also can i use a powroll 9mm stroker witheither if these kits? is it a good increase of power? relighable? fast? anyother info on 120 kits too will help

thanks

Steve

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I don't think the XR100.com cylinder has the bosses for the oil cooler, so that might be one consideration.

I think you can use the 9mm stroker with either, but why wouldn't you just go with the Kitaco 145 kit??? No case machining needed, and supposedly much better reliability than the Powroll.

MR

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I jus got it back and started to ride today. I can easily see better performance. It rips, i love it, its worth every penny.

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I have a couple of Engines Only 120cc motors and they have been great.

if you go past about 120 with a bunch of compression you have to worry about tearing the gears off of your kickstater shaft when you start it.

Most of the short track guys that run 145-150s only push start thier bikes and I have seen a couple with a little blow off cap on the cylinder.

If you stay at 120cc you won't need an oil cooler. I have never siezed one of my motors or had any oil related faluires. Go with a whole kit from one manufacturer (cam, valve springs, piston, clutch springs etc...) You have to remember that a cam and a piston are designed to work together and should be of the same brand.

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I have seen a couple with a little blow off cap on the cylinder..

Where on the head is there room for one ?

are you talking about ones that looks like this ?

29298-02.jpg

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I have a couple of Engines Only 120cc motors and they have been great.

if you go past about 120 with a bunch of compression you have to worry about tearing the gears off of your kickstater shaft when you start it.

Most of the short track guys that run 145-150s only push start thier bikes and I have seen a couple with a little blow off cap on the cylinder.

If you stay at 120cc you won't need an oil cooler. I have never siezed one of my motors or had any oil related faluires. Go with a whole kit from one manufacturer (cam, valve springs, piston, clutch springs etc...) You have to remember that a cam and a piston are designed to work together and should be of the same brand.

i agree, engines only has really good products and great service, they know xr100s better than anyone

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The stage two kit is the way to go as you will need heavy clutch springs if your motor makes the power it should. The EO kit costs more but they make great power and are reliable. You shouldnt need a high output pump as it is still only doing the same job unless you add an oil cooler and have oil line and cooler friction.

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Hey, I have ridden a few bikes with 120 kits on them and liked them. I have a BBR120 kit still in the box sitting in my room that I dont have any need for. They retail for $400 and Ill let it go for $20-$25 less than that.

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