More Speed in High Gear??

I have a Dynamark with an 11 hp B&S on it. It has 1,2, and 3 gears. What are some ways i can make it go faster in 3rd gear, for road use, but still keep the power in 1st and 2nd gear for offroad use? Thanks in advance!!

Upping the speed by a reasonable amount does not reduce power enough to prohibit offroad use. We ran 3 speed trannys for years set for 45mph top speed and still ran them in the woods/hills. It gets a little crazy at times, depending on what you are attempting.

It is nice (since we upgraded to 5/6 speed transmissions) to have a creeper gear for going downhill, as it saves the brakes.

What are some ways i could increase the speed though?

Pulley swap is the easiest way to increase speed. If you increase the size of the engine pulley and/or decrease the size of the transmission pulley, the tractor will go faster. This will affect all gears, but, like I said, a moderate increase will not reduce power enough to prohibit offroading.

FearlessFront has some pretty good "how to" videos on YouTube.

My 6 speed in a '94 murray was 'normal' in 1st after a pulley swap , but after 2nd it went drastically faster.

So...i measured my pulleys today.
I have a 3 in. diameter pulley on the front and a 8in. diameter pulley on the rear. What would be the best sizes to put on it?

i have a 3 inch to 4.5 inch, but my gearbox is a 4 speed not a 3. I guess a 5.5 - 6 inch should be good.

I'm thinking about leaving the 3 in on the front, what would be the best pulley for the back to get around 15 mph in 3rd gear?

like i said, a 5.5 to 6 inch should do it. Im only wanting about 15mph with the pulley swap i'v done so a 3 to 5.5 inch on a three speed box sounds about right.

Oh i didnt really pay attention to your last post, but it pretty much explained exactly what i asked. Thanks for the help dude!

lol silly you

I guess instead of 5.5-6 on the back i thought you meant 5.5 on the front and 6 on the back haha

if your transmission is a pearless 600 or something i run a 4 or 4 1/2 in the rear and standard 4 in the front also

Using bigger pulleys will give you more belt wrap, reducing slippage when wet. Say if you where using equal pulleys on front and back 3 to 3 is the same ratio as 5 to 5. But the 5 to 5 would be a lot less slippage.

Its a peerless, i don't know about the 600 part though. I called around today and found a place that had the pulley. After i went and got it and tore everything off i realized the keyway was different. So i took it back and turns out they didnt have the one i needed after all. And to make matters worse the original pulley was so rusted it bent under all the pressure i had on it to get it off. I ended up finding a pulley that was a tad bigger and slapped it on until i can find the size i needed. It may be a little slower, but i have a whole lot more power in 3rd gear and no belt slippage lol. And i can pop wheelies now too

i wish i couldnt pop wheelies if im going at idle speed and go to full speed to fast i will pop a wheelie and flip

greener179 wrote:

i wish i couldnt pop wheelies if im going at idle speed and go to full speed to fast i will pop a wheelie and flip

lol sound fun. A couple of years ago when i had my electric buggy/go kart, i took it into a skate park, into a shallow bowl hoping it would get up the other side. Well lets just say it didn't have enough weight over the front axle and it kinda back flipped, go's without saying, it didn't go well (not a wheelie but it was funny apart from braking the tail lights and the charging socket)

I can do small 6 inch wheelies on my tractor (before pulley change) but i haven't had it running since the pulley change so i don't know how well it will be able to do wheelies now.

I'd say i get around a foot off the ground in the front. The clutch isn't working exactly right with this setup but i don't think i will adjust it yet because i'll just have to redo it after i get my other pulley. And wow the flipping thing sounds scary lol. Makes me want to weld a roll cage on...lol

TennesseeCowboy wrote:

And wow the flipping thing sounds scary lol. Makes me want to weld a roll cage on...lol

lol you could make a roll cage or you could build a removable wheelie bar with a small wheel. you'd be able to do really long wheelies without the risk of flipping over.

Yeah i can only hold a wheelie for about a sec or two lol

TennesseeCowboy wrote:

Yeah i can only hold a wheelie for about a sec or two lol

Put some weight on the back or shift your weight more towards the back. There's a few ways to help get longer wheelies

Good news i finally found a 5" pulley with the right keyway. I put it on earlier, and i just measured for my belt. I'm off tomorrow so hopefully i'll make some progress:D

My mod murray had a terrible tendency to pop wheelies - i didnt like it at all , ive flopped over a bunch of times popping the clutch on my tractors - couple times i did ride a wheelie ( racing my buddy on my stock dynamark) and have a couple pics of short wheelies.

Im running two three inch pulleys on a 6 speed

So i finally got it going and i will say that i am impressed. I don't think it goes 15 mph but it has enough speed for around the farm and it still has a big chunk of power. I also got the brakes adjusted perfectly so it'll stop on a dime.