There is a guy on ebay selling 72cc kits, still marked 49cm3 on the jug, I bought one and slapped it on and its the best thing I think I've bought for my fiddy. I don't have the link to it but it under keyword xr50. Price is like 92.00 with free s/h. comes with the jug, piston, rings, and all gaskets needed. If you want that little bit of extra power and not the sikness of the 88 kit, get this.

 

I have this same kit.

I like it, in fact, I plan on putting this on my stunt bike. Only bad part is, if you race, they don't know where to put you. I raced motard, and I couldn't race stock class, couldn't race 88 class, so ended up running in Amatuer unlimted with the 107s. Needless to say it wasn't much of a race.

 

that is awesome, i would get it if i had an ebay account, i really just dont want to ef with all that ebay crap

 

there are also 81 and 82 cc cheater's out there.

 

Were's Fab at on this one...

Yo Fab you got any cheater kits? What do you think about them???

 

LOL. who cares what i think? i dont understand the hype. same as any other 72,82, or 88. the only differance is you get a stock cylinder that has been bored out and had a new sleeve pressed into it. who really cares what the cylinder says on it? it is a good price though if the parts are good quality. i bought a piston from DRATV for this same purpose and turned out the damn thing wasnt machined properly and the valves were hitting the head. just watch what ya buy is all. bore kits get a reputation real quick, whether it be good or bad, just do research before you buy something that sounds too good to be tru.

 

How much does the ebay guy want for the "cheater kit", Do what fab said and look at dratv. Just get a piston from them and a cylinder off a 70 and your done. Thats how I did my 72cc kit for under $80 and its still running strong a year later.

http://www.50mod.com

 

whooops, diddnt read the first post to well. $92 bucks isnt that bad if they ship it and give you all the seals and stuff.

 

So when u did the 72cc..what size jet did you use to get that working? Are you using a stock pipe and air box?

 

62 main works great with a 72cc kit and stock pipe and filter

 

hey fab how much can you get a 72 for? with the whole set up

 

interesting to say the least.. i didn't know it was that damn easy.. i always thaught those kits were incomplete or something thats why they were so cheap. Does 72cc make a huge difference?

 

i dont sell 72cc kits

 

They don't make a huge difference but a really noticeable one. The torque in first and second gear is perfect. I rode an 88 and didn't like it because it had way too much power and I couldn't keep the front wheel down. Trust me this kit is the chit for someone who wants more power w/o all the $$$ and b/s of the 88 kits. the only downfall of the ebay thing is the guy dropships out of veitnam and it takes about three weeks to get to the u.s.

 

There is a very noticealbe torque gain with the 72cc. I still think the 88's are crazy but thats me. if you are looking for a solid, cheap power gain then the 72 is the easiest way to go. I'm pretty sure I am still using a 60 main jet on my carb and the thing runs great.

Just go search around for a used xr70 cylinder and then get the 47mm flat head piston from dratv. Just make sure to buy new seals. If you got questions just go look at my shitty walkthrough http://www.50mod.com/72cc.php