299 cc rotax - Snowmobile Forum: Your #1 Snowmobile Forum

runaway · 05-06-2007, 09:22 PM

hello all i have this rotax in my buggy and every one says that the piston will swell in the cylinder and freeze it up if i ride it in the summer is this true? you guys are the only ones that can help me thanks

upersleder · 05-07-2007, 12:37 AM

NO not true, BUT you have to make sure you have the carb adjusted correctly, its a fan cooled motor, you should be fine.

**smallengineguy** · 05-07-2007, 07:11 AM

Uper is right! If what your friends were telling you was true, every lawnmower would seize up! All air cooled engines are the same principle wise, Just different oiling systems, etc. Check the spark plug when you run it, and compare it to the chart in the engine section of this forum. You might have to rejet the carb for the best results.

newcatrunner · 05-07-2007, 09:29 AM

nice setup...im doing the same thing but i have a 340cc twin on mine

PolarisINDY500 · 05-07-2007, 09:34 AM

couple of things i noticed...

why are you running a solid rear axle? im assuming you're going to be running on dirt?

do you have enough room for the clutches to move in and out? seems like the drive clutch is pretty close to the cross member w/ the sproket.

besides my observations, good work

**RJ Gleason** · 05-07-2007, 12:34 PM

not to nit pick too much, but I also noticed that it is going to be a PITA to change that belt at all, never mind quickly.

runaway · 05-08-2007, 12:39 AM

hello thanks for advise,as for changing the belt u can change the belt but not quickly. the buggy is no longer in that configuration i have since cut the back off and put rear suspension on the buggy i will post photos thru the build if u want.as for the live axle the buggy will be for trails and on the river when it freezes. as for the expanding of the belt the driven pulley only expands one way so it wouldnt hit anything.this is wat it looks like now

i still have to cut back axle and insert u joints so axle's will move up and down i figure between 2 or 3 inches of travel that should be enough just want to soften the ride. thanks again guys

oh i see wat u meant about the belt, that was during mock up that whole thing was just tacked there it came apart very soon after that.

SSnthe10s · 05-08-2007, 02:00 AM

rims and tires off a banshee?

PolarisINDY500 · 05-08-2007, 09:27 AM

looking good. keep us updated and post progress pics. this will give us something to look at since the forum is DEAD

runaway · 05-08-2007, 01:06 PM

hello
this forum aint dead u guys are here! does it just slow down in the summer or is it truly dead? whos from michigan?

PolarisINDY500 · 05-08-2007, 02:12 PM

yes..it's DEAD...hahaha... in the winter months you'll typically see 2 or 3 pages of new posts everytime you log on (logging on daily). now, its just one or two here and there. it will pick up again in october/november.

michiganders...ummm, im from michigan, then moved to IL, but still consier myself one

...but some of the more familiar faces are IRS, locky, 'rida, SS, just4play, mouse...and a few others (feel free to chime in). most members of this site are from MI, however, arent realy active.

SSnthe10s · 05-08-2007, 10:32 PM

yea im in SE michigan.

upersleder · 05-09-2007, 01:02 AM

UP MI here

**RJ Gleason** · 05-09-2007, 04:01 PM

Just keep posting pics as the work progresses.
BTW, Welcome and Happy Trails

runaway · 05-09-2007, 06:01 PM

hello
does any one have an idea of the power of this motor,the guy i bought it from used it to pull broken sleds off the ice.i will probably use a 10-13 tooth drive sprocket and a 64 tooth driven sprocket. do u think it will spin the tires or even pull a wheelie? i just have no idea of wat to expect. when setting up belt does the belt have to be tight between the clutches or a little loose? now the side with the springs on the driven clutch does it matter wat way it faces and if so how do i tell? ii thank all u for your help, i became a member of three forums to do this project

**smallengineguy** · 05-09-2007, 06:23 PM

The belt should be all the way inside the clutch on the engine and all the way out on the other one. There should be about 1/2" of deflection or so on the belt.

upersleder · 05-10-2007, 01:29 AM

HP is 12-15. spin tires....maybe, wheely, NOT just my opinion. the gearing is going to be trial and error

runaway · 05-12-2007, 04:26 AM

hello
hey guys with a little work u can join me on the trails!

littledawg · 05-16-2007, 11:22 AM

kewl ride runaway

**RJ Gleason** · 05-17-2007, 11:57 AM

Quote:

Originally Posted by runaway

hello
hey guys with a little work u can join me on the trails!

Is that a belt or a chain that drives the rear axle?