Top Speed of Max IV / RIM

[H82luz]

I'm new to all of this I just got an old rim with a new kohler command 25hp engine and a rebuilt t-20 my major question is my top speed is only 12mph is this right?

[jpswift1]

That's the one that has been for sale on Pittsburgh Craigslist for a while, right? That should move about twice that speed. He probably has the incorrect clutch spring in the driven clutch (2 stroke spring because it probably originally had a G50B Chaparral 2 stroke in it) and the belt is probably way too lose.

[msafi65]

First thing to check is belt tension. Should be just able to pull the belt up and get about 1/16 inch clearance on inside hub( at crankshaft ) or engine clutch. Looser than that will give pour performance. Also full throttle with the belt on in reverse should be about 4100 rpm

[ARGOJIM]

Also full throttle with the belt on in reverse should be about 4100 rpm

I believe msafi65 meant to write "4100 rpm in Neutral"

[H82luz]

Thanks guys yes this is the one from Pittsburg. Forward it revs to 4000rpm what spring should I get?

[amphibious drew]

Green or red. The red is for more grunt, and the green gets you up to speed a bit faster.

[H82luz]

Is that spring for the engine clutch or the tranny clutch?

[amphibious drew]

The secondary (on the t-20). You may want to post a picture of your clutch setup to make sure it's the right clutches as well.

[H82luz]

Thanks a lot I will take pictures tonight. Another question is the only way I see replays to this post is if I check it. Is there a way to get an email notification?

[mike d]

Congrats on your puchase H. You have to check back every day at least 4 times once you have joined our cult. Its a rule. Then you will buy more machines until you can't fit cars in your garage. Oh wait, thats sounds like me. Anyways good luck. Later Mike

[H82luz]

Thanks mike.. I see you are in amesbury ma in Worcester. Could you pm me?

[H82luz]

Well the first part of my problem is the belt Is 3" to big new ones on order.... Thanks mike d

[H82luz]

Ok so I installed the new belt now top speed is up to 15mph. Does this sound right with 21" tires?

[Mike]

That still sounds slow. Did you tighten the belt when you installed it by sliding your motor back away from the transmission?

[H82luz]

I didn't see any way to slide the engine. It looks like it bolts right to an engine plate