yeah my redcat is the same gear pattern its hard to get used to.

 

i have the red cat...the redcat is the red white and black gy200.........

 

oh yah, i have the crazy shift pattern too.... i talked to a guy that served in the military all over the world and he said in every other country thats how it was...and if you think about it, its better.....i recall on my old bike, shifting to get comfortable and suddenly about goin over the handle bars from an accidental downshift.....not fun.......i like this pattern.

 

I'm glad to see this forum getting active again...I want to summarize all the simple ways to get better performance out of your GY200. I have done all of these mods myself and they didn't require much skill.

1. Change to a Honda Spark Plug --- The part number is NGK DP8EA. This will burn a little hotter than the stock spark plug. Your engine will perform a little better with it.

2. Change to a smaller rear sprocket --- Use a 40 tooth sprocket. The bolt pattern of a GY200 is the same as a 1978-1982 Honda XL185S. You can go to your local dealer or order one online at sprocketspecialists.com.

3. Install an air filter that attaches directly to the carburator --- You need an air filter with a 38 mm opening. There are many types of air filters out there...The reason this help performance is because it helps your engine take in more air.

4. Drill out the restrictor from the back of the muffler --- This helps your engine get rid used air. The better an engine can breathe, the better it can perform! In combination with a the new direct air filter you install, you should notice a much better performance.

5. Wrap your total exhaust pipe & muffler with exhaust wrap --- This improves your engine's horse power. This is a subject of much debate on the Internet of whether exhaust wrap does any good. I can testify that it does help. The reason it helps performance is because it keeps the heat inside the pipes. This helps evacuate the hot air out of the engine better. As mentioned earlier...the better an engine can breathe, the better it can perform! Just be sure you buy a roll that can withstand at least 1000 degree constant temperature. You should buy a 50 ft. roll.

I hope this info helps somebody. These simple mods can make an already GOOD GY200 into an AWESOME GY200!

 

You need to change the jet out if you have intake/exhaust mods. The stock jet was a 98 on my bike. When the bike was stock, I needed to downgrade the jet to a 92 for my elevation. I then gutted the muffler, got a foam air filter fitted directly to the carb, and put in an NGK iridium spark plug. I now run with a 112 jet. It's a totally different bike. The top speed was about 50, now it's about 65. The low end for the trails is awesome.

If you do mods and don't change the jet, your bike will run lean and you may burn the exhaust valve. Enrichining the mixture to slightly rich (~13.0:1) will give you the best power.

 

How are you meant to drill out the restrictor from the back of the muffler? What do you mean by that. I want to do it but i don't want to stuff it up.

 

Hey i got one of those high flow air filters for my GY and it will not fit. The place where the shock bolts in is right in the way. Also how would i gut the muffler of drill a hole in it like you were talking about.

 

Even without rejetting, my motorcycle performace is much improved by attaching an air filter directly to the carburator and removing the restrictor from the tail pipe. I could just imagine how well it will perform when I get the carburator rejetted. I'm going to make an appointment at the local motorcycle shop and have that done.

I don't know why your air filter wouldn't fit. You need to make sure you have an air filter that has a 38 mm opening and clamps on to the carburator just like the tube from the old air filter box did. If you buy an air filter without the same clamp set up as the old air filter box, then obviously it won't fit.

Drilling out the restrictor from the tail pipe is pretty straight forward. When you look at the rear of the tail pipe, you will see a little hole where the exhaust comes out. This is the restrictor. All you have to do is drill little holes around the perimeter of exhaust hole to make a complete circle. Once you drill a circle, you will feel the restrictor fall off. Just remove the restrictor and you will notice that your motorcycle will get rid of used air better.

 

The circle part that goes on to the carburator will fit but the filter is too long and it hits on the bracket where the rear shock bolts on to the frame. it would work if i could find an S piece so i could get it above that bracket but im not sure if that would work or not. Thanks for the tip on the muffler.

 

Do you have a jet moto or Redcat maybe they are different.