Recent Posts  By   (Read times)

No it isn't normal. It didn't backfire for 3000 miles.

First thing you need is a valve adjustment. you are way overdue and if the exhaust valve gets down to zero clearance, you're gonna burn it.

Put a new air filter in it, might as well throw in a new spark plug.

Check your exhaust system for a leak.

Check the crappy PAIR valve system. Or you could just rip it out and fabricate a block off plate for the exhaust port (like I did).

You've only got one vacuum line from the intake manifold to the fuel pump (it should be that simple on all scooters with a carb), check it.

Check your fuel pump by removing the fuel line from the carb and hitting the starter. Gas should squirt out in a healthy stream.

Your carb my need adjusting, maybe the fuel mixture screw. Unfortunately, all of the adjustments are sealed off to make the EPA happy. You would need to remove the carb and unseal the fuel mixture screw, float bowl screws, and the diaphragm cover screws. Like most scooters and motorcycles, it was tuned lean for the EPA. I had to richen the fuel mixture screw 1/4 - 1/2 a turn and change the main jet from a #108 to a #110. It ran fine stock, but it ran smoother, cooler and stronger after tuning the carb and fuel consumption stayed the same at mpg.

Check the intake hose on the carb all the way to the air box for any leaks. Check the intake manifold and make sure it seals properly on both sides with no cracks or splits.

I know you don't like to wrench on your scooter, but your only other choice would be to pay someone too much money to take way too long and do a half @ss job at best.

There are lots of "how to" videos to learn from, and several knowledgeable people here that can answer any question you have if you get "stuck". Most of this stuff is very easy and basic, and after doing it once or twice you will wonder why you didn't learn before.

Just be careful on who's advice you follow. There are a lot of wanna be mechanics here that don't know what they are talking about...

, 5 seconds of google pulled up one for a Harley.
www.denniskirk.com/80649731.sku?utm_source=shopping&utm_medium=cse

You could probably just adjust the rear axle on the swing arm to make the stock belt fit. You could get a bracket to extend the swing arm, or you could find a shorter belt with the same tooth spacing. I know these parts aren't growing on trees, but if need be you could easily fabricate something that will work. And while you won't be able to adjust the drive belt like a chain or have as many sizes available, you still don't have to replace the front pulley, just make sure it matches the new rear.

There is nothing magical about the rear drive pulley. It is bolted on to the rear rim much like a disc brake rotor. Just like a custom disc brake rotor, a drive pulley could be fabricated or altered. It's not rocket science.

If that sounds too complicated, then you could just switch to a chain drive like scootnwinn suggested.

107 to 115 is a big jump. I didn't even know there was a 107.

Anyhow if you need more fuel, bumping up to a 110 would be better to try first.

That being said, if you have a stock 49cc two-stroke, there's no way it came with a 107, it would barely (if at all) run when you twisted the throttle open...

If you mod your engine to produce more horsepower, it's gonna produce more heat, that's physics.

While the engine may be more efficient at making power, it will run hotter unless you can upgrade the cooling.

Most of the time a stock scooter/motorcycle engine is tuned almost too lean just to pass emissions. Lean conditions cause a hotter running engine, especially on a two-stroke.

Re-jetting the carb properly after some minor engine upgrades can improve/correct the fuel ratio so that the engine actually runs cooler than the stock configuration. That being said, if you correct the stock lean conditions without engine mods, it will run even cooler.

The Wolf was quick to 45 mph, but after that the Suzuki had more power. TU250x cruised nicely at 65 - 70 mph, the Wolf liked 55 mph and topped out about 70 mph. Wind and hills affected the Wolf more.

The Wolf handled better and was much lighter, the Suzuki was much more comfortable. The Wolf was better off road, the Suzuki carried a passenger better.

They were both fun and capable, just different. I liked them both, hard to choose which one was better. But I think the extra power and size of the Suzuki along with fuel injection made it more versatile overall.

Yes, my red 2009 TU250x could hit mph. I sold it to gentleman that flew into Tucson and rode it home to California among other places. He had to get on the interstate at one point and rode it WOT through the desert for 200 miles straight.

It ran bulletproof and begged for more. The Suzuki made the entire 1200 mile trip flawlessly, it had 5700 miles on the clock when he started.

By the way, I sold it to him for $1995 and he bought it sight unseen. It was in brand new condition, almost perfect, and he wasn't disappointed.

Somehow, I don't think $1050 delivered for the Roketa 127cc sounds like a bargain

Yes, that is correct!

It seems China scooters rule this forum!