I'm just looking for a trail bike i'm going to go test one and find out..lol.. but as far as top speed for the jetmoto 200 what is it stock?

 

OK OK so i went out locally to find some knock off bikes like these and came across another brand called ROKETA anyone know much about this brand?

 

Need GY200 rear axle.....who has them?
12" long 15mm thick.

 

You can probably get an Axle at lowes or a hardware store its just a long bolt, Just get the same size as your axle and make sure they match up good.

 

The bolt (9/16") idea is an option, but that has some disadvantages:
1)Lowes does not sell automotive-hardened/quality fasteners....I'd have to get it on-line.
2) 9/16" would leave about .05 inch of slop....high-speed wobble is likely. This is scarey and something that I never want to experience again.
3) The smaller size would make it likely that the bearings would spin on the thinner axle, creating additional problems down the road.
3) My tool bag would now have to include S.A.E tools in order to do road/trail-side service.

The stock axle is a whopping 12" long, and 15mm wide.
Only the older bikes use the thin 15mm axles, so my options are limited.
In addition, I have only been able to find one make/model so far that does use a 12+" axle. Most every other bike is in the 10-11" range.

Thanks for the help. :-)

 

I own a Jetmoto 200. The stock 15 t front and 56 t rear sprocket kept the bike screaming at 50 mph--75 mph if pushed off a cliff, lol. I spoke with the parts guy at Jetmoto's headquarters. He told me that a few years ago, the bikes came with a 42 t rear (I don't remember the exact one, but it was in the low 40's) and 17 t front, and the bikes would hit 70 mph easily. He said that people wanted more low end for trail riding, and thus, the 56 t rear and 15 t front was chosen as the stock sprockets.

I changed just the rear to a 44 t, and it would cruise at 50-55 mph, and would hit 60 in a pinch. However, even though it seemed to run out of steam, it wasn't screaming for mercy, but rather it just seemed to hit a speed limiter. I bought a 16 t front sprocket, but before I could install it, the engine gave out. Rather than fix it, and risk stranding myself like the old engine did to me a few times, I am saving for a new engine and carb.

 

How did the motor blow?
How many miles were on it?
What broke on the engine?
Were there any symptoms before (knocking, pinging, valve noise, etc.)?

Cheers

 

It seemed to be a series of things that did in the engine. The roads around Yuma are all 50-55 mph (the city streets are 35-45). However, having alot of cross-border traffic means that the speed limit is ignored, and the average speed seems to be 70 mph. Being tailgated with you r bike screaming at 50 mph is not the best way to break it in.

The beginning of the end seemed to be the day that I took it on a non-paved road. The terrain for hundreds of miles around Yuma is sand; very beach-like sand that doesn't give a feeling of confidence when ridden on. There is no actual dirt to be found--just sand. One day, a frontage road I was riding on turned from pavement to sand. I was doing fine on it, and kept the speed to about 10-15 mph. Right before it turned back to pavement, it got really deep, and the back wheel got stuck. Trying to rev the engine, got the throttle stuck, and the bike would only stay full throttle as soon as it was turned on. I tried to use the feeble tool kit that comes with the bike to no avail. I had no cell phone, and the nearest gas station was about 5 miles behind me. The temperature was getting hotter and hotter.

I decided that I would get the bike running, go over the freeway to the fully paved frontage road, and ride the 5 miles to the station. I had to really use the clutch the few times I needed to use the brakes, and I made it back to the station at 50 mph (the stock gearing wouldn't go any faster) with the engine screaming for mercy. I called some friends to come pick me up.

I fixed the wide open throttle with the help of a bike mechanic friend, and there was a lot of sand all over the engine, in the carb, etc. The bike was fixed, and I finally installed the rear 44 tooth sprocket and modified the chain. I rode the bike for about another 150 miles that week, and the bike just conked out. My friend checked the compression, and said that he was fairly confident that there was none. The engine would either need to be rebuilt, or I figured, just get a new engine. With the gearing "fixed" I would break the new engine in like it was supposed to be broken in without hitting redline in the first few hundred miles (the sticker on the engine said not to exceed 50 kph for the first 600 km's, something I didn't do. I really think the sand incident assured me that I would suffer catasrophic failure along with not following the break-in recommendations. (The bike has about 805 km's on it according to the odometer).

As far as warning signs, there really weren't any. I was on a highway at 55 mph, and the engine started going out like it was running out of gas, or like when the original spark plug needed replacement. I had even been proactive and packed a gapped spark plug for just such an event, and changed it on the side of the road, but there was no action...it was dead.

 

jimbob, you can probably get one from jetmoto or tank if that don't work the rear wheel is a clone of a honda 1980 xl 185s if this helps

 

hey my name is Troy i just got a gy200 for my 18th b-day and my bike top speed ia about 50-55mph. but i was woundering if anyone esle have had problems with bike vibrations between 50-55mph is so is there a way to reduce this.