Performance guess.

[DAM shop]

All right guys, here we have what we at the DaM shop call "ugly.". We picked this up a few years back from a guy that said he used to race it back in the day. We have never done anything to this trike besides switching out the stock cam. It has a hooker pipe on it, a 55 tooth sprocket and a 110 jetted carb with a k&n air filter and honestly that's all we know for sure.
Here's our dilemma this things runs like a raped ape, wheelies, low end torque, speed and very very responsive. I am honestly at a point of riding on one wheel no lie. When you goose the throttle on this you can lift the front wheel off the ground in 2nd.
We are stumped as to what this has in it for parts, big piston and stroker you say yeah probably so. So what we did was build another motor a 90 5 ml over bore, stroked it, aftermarket cam and exhaust, geared it the same even the carberator and jetting is identical. We were able to get close to uglys performance but honestly it's not in the same league especially with responsiveness.
My question to you all is, what makes this thing so much more responsive then the other we have? Could it be the stroke of the crank? It kills us not knowing but she's such a great trike we don't want to tear into it to find out.. oh yeah ugly is on a stock frame the other is a nick. Still that wouldn't make up the difference in the power band..
Any thoughts?



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[yaegerb]

All right guys, here we have what we at the DaM shop call "ugly.". We picked this up a few years back from a guy that said he used to race it back in the day. We have never done anything to this trike besides switching out the stock cam. It has a hooker pipe on it, a 55 tooth sprocket and a 110 jetted carb with a k&n air filter and honestly that's all we know for sure.
Here's our dilemma this things runs like a raped ape, wheelies, low end torque, speed and very very responsive. I am honestly at a point of riding on one wheel no lie. When you goose the throttle on this you can lift the front wheel off the ground in 2nd.
We are stumped as to what this has in it for parts, big piston and stroker you say yeah probably so. So what we did was build another motor a 90 5 ml over bore, stroked it, aftermarket cam and exhaust, geared it the same even the carberator and jetting is identical. We were able to get close to uglys performance but honestly it's not in the same league especially with responsiveness.
My question to you all is, what makes this thing so much more responsive then the other we have? Could it be the stroke of the crank? It kills us not knowing but she's such a great trike we don't want to tear into it to find out.. oh yeah ugly is on a stock frame the other is a nick. Still that wouldn't make up the difference in the power band..
Any thoughts?



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Strip the motor and find out.

[HyKlas]

Because it's got my name on it...

[El Camexican]

Check the tank for Flubber

[Cribbs74]

You won’t know for sure unless you break it down. Head work is something you didn’t mention... it would account for some of the difference. Lightening and balancing the rotating assembly could be a possibility as well. Compression differences? Pulling the head is not to intrusive and it would allow you to check the deck height and CC the head.

Ron