Tire size, how much is too much for off roading?

[StoveBolt]

Originally Posted by scottyb

PErsonally, I have yet to meet the 9 hp motor that can spin 23s in the sand or uphill for that matter. I think you are setting yourself up for some disappointment but lets hear from others who are hill climbing with a stock 9 hp motor, 36 degree clutch and 23s ......

I agree (no sand and flatlander here)

[scottyb]

Mud hills and Sandy Bottom driver here

[pachanga90]

If you are planning on staying with a stock motor,do some clutch-mods at least and stick with 22's.My Marathon has the 244 2-stroke,and i shimmed the clutches and also removed the shim between the sheaves on the secondary so it closes tighter.The most noticeable mod was shimming the primary.It runs like a different machine because it raises engagement rpm and allows you to rev it in mud.The belt is another good mod,but i haven't tried it yet.We had my cart in thick,slimy mud over the axle with 500lb of me and a friend and crawled thru it pretty good,we were all impressed.Hope this helps

[IRCJB]

Well; almost a year in service has concluded this......
-the setup
Stock 295
Short belt
Heavy primary spring (1800 engagement)
23x10.50 V bar tires

The verdict
-Weak, but enough for fun in most situations.
-Breakout torque, very poor. Momentum is your best friend.
-Don't even think about spinning through signifigant mud. Momentum quickly bleeds off and you're left without any torque when it does stop.
-Does OK on sugar sand, but it giving all it has. I wouldn't be surprised to see an overheat in continuous operation.

[slim67]

Originally Posted by scottyb

PErsonally, I have yet to meet the 9 hp motor that can spin 23s in the sand or uphill for that matter. I think you are setting yourself up for some disappointment but lets hear from others who are hill climbing with a stock 9 hp motor, 36 degree clutch and 23s ......

My stock FE290 with the usual mods and 22s does good up hills but without a roll cage Im not trying to go up something too risky.Im not disappointed at all but surprised at what I can do. I just havent driven a big block cart yet to compare it to.

[onlyonmonday]

Being a virgin I ask this;

Can the rear gear be changed to get some more BEEF ??

[scottyb]

Originally Posted by onlyonmonday

Being a virgin I ask this;

Can the rear gear be changed to get some more BEEF ??

About 15:1 is the lowest I know of. That is what I am running in my 25hp off road cart. It is turning 25s on aluminum wheels, wheel weight factors into the power equations too.