I clocked mine yesterday and it hit 67. But I have 20 inch tires and stock gearing. I did it with a radar gun so its accurate.

 

That is damb fast for a stock trike with 20's!

 

im finding it hard to belive it went 67..did you go down hill? I got a 350x with 20 tires, and im lucky to hit 55-60....stock gears...

 

a 350 will definetly do 65 -70. your bike may not be working the best. A buddy of mine has a 450 foreman and my trike will go side by side up to 80km/hr. which is roughly 45 -50 mph. going down a slight grade it peaked at 84km. its only a 200.

 

Size of the engine makes no difference in top speed, only how fast you get there. Either that 350X was SCREAMING and ready to chunk, or your gearing is a little different than stock. One or two teeth make a big difference. What are the teeth counts you are running. (I am not doughting you, I am just interested) The 20" tires are the weird part. 2" in height makes a HUGE difference in curcumference, and makes you cover ground faster with the same engine rpm.

 

well..my engine seems to be running fine, I'm pulling drags faster then the 400EX....and hills climbs like a mother...lol...but I DID have 22" on it...belive me...it feels like it drops 10-15mph when I went to the 20"...theres NO way its hittin 70 mph with 20" tires..unless ur goin down hill...or someone is pushing you w/ a car....

 

Well drummerboy, dont f*ckin beleive me, I dont have to lie to impress you. I thought it was fast for stock gearing also. I have 13/40 sprockets and 5psi in my tires. Dude, I had no idea it was that fast cause it has so much bottom end, It seems to rev a little higher but I think its from the port job.

 

any time, wesly. and being that I got a cop to clock me, I am certin it hits 56

 

Same thing that clocked me, Look believe what you want. I am not going to sit here and argue how fast my bike is, Im sorry it did that fast, For your sake I wish it would do 40, so yours can be better.

 

My friends 350X does upper 50's in real life and 71 online. It's all stock except for a Cobra pipe. It accelerates a little slower than my 86LT250 with a shaved head and FMF silencer (stock pipe) which is pretty good for an 80's 4 stroke. In the dirt he could stay right behind me until he hit top end.