My new Long March, XY200GY-7

**slabo** · 04-18-2010, 01:31 AM

Hello,
I just got my Long March two days ago. I had a cruiser 3 years ago, never a thumper before. I had no idea it would be such fun. Roads? Who needs roads..

Electric cables were not insulated. Amalgam tape.

Bike vibrates too much if i reach 80km/h. How to fix this ? I've seen some bikes put heavy weight on the bar end to make it heavier, does that work?
Also, I've been told that i should not be riding over 60km/h for the breakin period, and i've read there is no such thing as break-in period on modern engines

. I'm going easy on it for now.

No fuel meter, but tank has reserve, so i get a warning before im completely empty. Duel tank does not have a lock, and i don't think it's possible to fix this. Any ideas?

New steering clamp is different than the original that broke with Supersignet and different that the redesigned one posted here Hope this one does not break.

Also, the choke lever has three positions, i don't which is what. Any ideas?
Road tires felt weird for the first few rides. I could feel the bike wobble too much. But it's the first time i've had a dirt bike. Getting used to it now, i still have to try to breaking hard on some empty road and see if i can handle the bike comfortably.

**slabo** · 04-21-2010, 08:06 AM

Anyone else has this bike? What cruising speed are you getting? I am comfortable at 70 km/h and if i try to go faster the bike vibrates too much i cannot hold on anymore. At 80, the rpm shows 5k on flat road.
Any suggestions? I'd like to get 100 or 90 km/h.
Other than this issue, im really happy with the bike. Climbs mountains easily, and it is really fun off road. Also, i dont mind potholes or speed bumps at all; barely notice i went over them.

**felix** · 04-21-2010, 09:50 AM

Looks like a great for doing china!

How many cc is the dog?

**jape** · 04-21-2010, 10:13 AM

I'd be worried about the vibration, no modern bike should vibrate that badly. Where do you feel it? At particular revs or does it grow with speed? Front end or back, through the bars mainly or through the frame from the engine? I know you may have done it already but check the engine mountings first and look at obvious things like is chain correct size!. Many things can cause vibration.

I'd have a good look at the alignment and connection of all running parts and the suspension too (are the shocks low on oil?), maybe a bolt out of line on rear or wheel rubbing, something like that.

We need to know more about what and when you feel the vibes. Does it vibrate when revved but stationary etc. Under acceleration or deceleration or both? What happens when you (carefully) pull in the clutch at speed (this isolates engine).

It could be many things like steering head not tightened up enough, bad rubber pattern on a tyre, even wrong pressures, wheel rims unbalanced, an engine mount cracked, sprockets and wheel bearings loose, right down to nasty things like crank shaft. Sorry not to help much but need more info. Be careful for a while and tell the dealers if it isn't something obvious.

After all that is sorted, you can also get rubber mounted foot pedals!

**slabo** · 04-21-2010, 03:03 PM

Felix, thanks. I just love getting lost on this bike. Dog (Milo) eats as much as i do. I think his stomach is ~200cc, heart 50cc.
Vibrations I mostly feel through the grips. Also if i close my knees around the gas tank. Vibrations only get really bad if I reach 80 km/h. Then i don't feel confident going any faster. I can feel the vibrations die momentarily if i pull the clutch, just until I'm in gear again. But I can check again tomorrow, I'll keep the clutch closed and see if it rolls smoothly. I will also try to rev it while stationary, in neutral or with clutch pulled?
I should mention that it's a bit smother now than it was first 200-300km. So far I've done 650km.
Dealer says it vibrates because of the big rear sprocket, he says bike is not made for road use. I don't buy that Chinese way of trying to

me. I don't want to change the rear sprocket because I really like how the bike handles off road; i don't think it will behave the same with a smaller one. Bike is brand new from the oven, nothing was obviously broken, but i will have a closer look at engine mount tomorrow. The only odd sound is my keys rattling.
Thanks for the quick reply, i'll update tomorrow.

**ChinaV** · 04-21-2010, 10:42 PM

Slabo,

Thanks for sharing your experience with the GY7, nice to see you racking up the miles quickly.

About the vibration.... that's the way they are. I rode Supersignets GY7 last spring and I couldn't get over how much it vibrated above 75kph. The dealer is correct, the bike is not geared correctly. Ninety percent of the bikes sold here do not have the correct gearing for their intended use. Play with the sprockets, they are a cheap easy fix to the problem. If there's enough space up front, try going up one tooth.

Enjoy your bike!

Cheers
ChinaV

**joe** · 05-13-2010, 04:35 PM

Hi slabo
This may sound strange as i only have a 125 lifan ,but that would vibrate at speed 50 -65 mph,way hay,But i bought some alloy rims and had them rebuilt buy a chap near me who restores british bikes and lo and behold the vibration has gone(even thrashing it doing 70mph on the clock).so you never know maybe try tuning the wheels,i did notice before the new rims that the spoke tension was a bit hit and miss,but now they are nice and evenly tensioned,it may be worth a go

**slabo** · 07-16-2010, 09:20 AM

Thanks for the advice joe. On my last trip, i found out that i'm going 60km/h from my GPS, when the speedo was showing 100km/h !!!
That convinced me to throw out my tires, it's just ridiculous cruising at 45 km/h, even scooters were passing me. Shame, shame.. But maybe with new tires bike will feel more balanced. Report coming soon of my trip from Kunming to Chengdu and back.
I made 5900 km on the bike so far, and no major problems so far, but shifting does not feel as smooth as before.
battery dead again! I'm buying a new battery, not from dealer. Anyone has an idea what's a good battery brand in China?

Thanks

**humanbeing** · 07-17-2010, 02:24 AM

http://www.yuasa.com.cn/English/main.asp | http://www.tongyeebattery.com.cn/en/
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Btw: Pls photo the DEAD battery's brand when installing new battery.

**slabo** · 07-20-2010, 07:03 AM

Originally Posted by humanbeing

http://www.yuasa.com.cn/English/main.asp | http://www.tongyeebattery.com.cn/en/
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Btw: Pls photo the DEAD battery's brand when installing new battery.

Thanks for the tip, i was looking for Yuasa, Rocket or Varta..
But I was in a pinch, was heading up for a two days trip camping and just did not have enough time to shop around. Found a dry-type battery at a motorcycle shop on the way, cost 120 rmb. Changed the spark plug for another 20 rmb... Did not take a picture of either! I'll try to find the battery again next time i go there.