[w3racing]

I have 2 motors and I want to build the most powerful, economical motor.



I have a kitaco 88cc ultra with a tb manual clutch and lightened fly wheel. I could throw in a tb crank and mikuni carb for around 200 to make it a kitaco 108 with high compression.



I have a stock honda with a new tb 88 kit still in the box and a new tb manual clutch. I could also take this motor, sell my new 88 kit and upgrade to a complete tb 117 kit.



I could also tear apart both motors and build a tb 88 motor with the tb head and build the kitaco into a 117 kit using the tb crank and cylinder and have a 117 with high compression.



What would you do and what will these options make for power. Thanks for any thoughts, suggestions, info.

 

[Kurlon]

Short money would be tossing a TB crank in your 88 and calling it a day. Toss a carb on there and you'll have a lil ripper.



(If you've got a lot of time on that motor, fresh rings and a hone wouldn't hurt.)



I don't think it'll be worth it to swap cylinders to take it to 117. If you're going that far, get a 54mm crank for $230, tall 54mm cylinder and piston, and a set of studs and cam chain and take it right to 124cc.

 

[Jetster220]

I disagree Kurlon, I think it would be worth it to do the 117. The TB117 is not much slower at all than a 124cc, espcially with a decent rider. I pull holeshots regularly against guys riding 124's.

 

[Kurlon]

True, but you've got a piston and head setup to work with each other, he's got an Ultra head that'll be looking for a bit more piston volume to setup proper combustion. That said, I don't think his 88 stroked to 108 will be that far off a TB 117 setup power wise, and it's a fair chunk less to just get a crank.

 

[turboglenn]

Kurlon...what motor of his are you reffering too? the ultra head or the TB motor that not built yet?

 

[RcWannabe]

Yeah I would go with what kurlon said and use your ultra head

 

[Jetster220]

True, but you've got a piston and head setup to work with each other, he's got an Ultra head that'll be looking for a bit more piston volume to setup proper combustion. That said, I don't think his 88 stroked to 108 will be that far off a TB 117 setup power wise, and it's a fair chunk less to just get a crank.

I follow you know, but I disagree on how far off on power it would be. I have ridden a Kitaco 88 Ultra stroked with a TB crank to 108, and it was not even close on power compared to my 117. Felt very mellow.

 

[Kurlon]

That really makes me think something was wrong with the motor tune given the kind of power a properly dialed in Kitaco Ultra 88 setup can put to the ground over a TB 88 setup.

 

[Jetster220]

Lol, also ridden both a 88 Ultra and TB88. Again, the Ultra did not feel much faster, little more topend was all as that was back with the smaller valved Tb head.

 

[SHADE]

sell Both motors, kits. and get a GPX with a 146 and sgr head. that motor will give you all the power you want.