I am building my new motor and had a couple questions...I have a counter weighted crank 69 mm.H beam rods new 94 jugs pistons ..now all i do is trail riding in the woods and climb hills in southern ohio what cam do i use and should i use 40 or 44 dual carbs i also need some new heads what do u guys think. I am not trying to build a crazy motor just something dependable and fun.....My rail goes anywhere i want now with my 1641 with dual carbs and 3 rib so a 1915 should help me from over revving when I am climbing

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Nail it

40s

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Hey,can you hand me those zip ties and that roll of duct tape?!

40's should do just fine but if you think you may bigger later on you go with 44"s and put smaller venturis in them

and for heads i would suggest some cb 044's with 40 x 35.5 valves and maybe a cleanup/mild port job

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Just Stand On It!!!!

Chris

I would run 40mm carbs. Even if you decide to step up on engine size later they will still work fine. For heads it all comes down to budget. Best bang for the buck in my opinion is CB's CNC ported heads.For an engine like yours I would use the Los Panchito with dual valve springs and for a cam, Web-Cam 218, CB 2241 or the tried and true Engle 110. compression about 9.0:1 give or take a little will be good for pump gas.

VZ 15!!!!!! You will be sick with any other cam

I currently have the same setup you do. I used a VZ15 cam for a few reasons. First it is a super torquey cam and you can use it with 1.1:1 rocker arms. I added a straight cut cam gear to that cam as well. I also used Weber 40's due to their reliability. I have this motor setup well and it runs as well as some of the small strokers that I ride with. Hope this helps and good luck

There are about 25 cams that will work great in a 1915. You need a recipe for the total package, not just pick a cam and hope you like it.

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Buy the best and cry once.

Thanks guys I got my heads and rockers 1.25 today I am gonna hold off on the cam for another week or so.I just don't want to end up with something I am gonna change later. I know half of you guys have done it lol....My goal is to be able to putt in the woods in 2nd and 3rd........

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Nail it

If your goal is a good running engine that can putt around in 2nd and 3rd with a 3 rib and 40mm. dual carbs, do not over cam the engine. Use a 110 Engle with your 1.25 rocker arms and you will be happy. Do NOT use a lightened flywheel. This is a good combination. If you have 31" tires or smaller, you might want to change to a 5 rib transmission down the road with this motor combination. You will climb much better with the 4.86 gear. Changing to the 1915 from a 1641 is great but your gearing will be wrong if you stay with the 3 rib. You will see what I mean once you get it done.

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Buy the best and cry once.

What did you end up getting for heads?

A friend gave me some OE heads with bigger valves....

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Nail it

A bunch of us were riding this weekend....I have ran Terra tires since I have had my rail and all my friends run bars now I love the terras..so we were all talking about r tires and my buddy says here put these bars on ur rail so I did and WOW bars climb much better ....so my buddy says keep them I said what....he said u like them so u can have them......now that's a friend thanks John love u man....the r new tires and new rims...

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Nail it

damn i need friends like these

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If it ain't broke ill fix that