
That way you can try the helmet on and be sure it fits. Ask for someone with experience in fitting helmets to serve you. You only have one head!

To be competitive in this class, and since no manufacturer is currently offering a 105cc model, this is the only option.
Standard cylinder on this enigne in nikasil. No sleeve.
To do a big bore kit you will either need to have a liner installed in the cylinder (not the most reliable option usually), or purchase a complete kit which includes a bored and re-nikasiled (or other plating) cylinder.
Because of the change in cylinder volume, standard porting will NOT work. The porting needs to be matched to the new engine displacement.
You can purchase a complete setup like this from shops like Lukes http://www.lukesracing.com/luksr/cr85bigbore105p04.htm
Another option which will actually give much better overall power is an increase and bore and stroke to the new 105cc AMA limit. It's more expensive, but will give at least 20% more torque and midrange power than just a bigger piston.
Companies like Max Power offer these kits http://www.maxpower-engines.com/big-bore-kits/cr105.htm
He'll have to also remember that putting this much more power thru the engine can result in decreased lifespan of transmission and clutch components. Just something to keep in mind!
PLEASE!


what bike should i get wat cc how fast will it go plz help i need a bike asap witch shops sell them or internet sites i have a bout 500-700 dolars to spend

Your only other option is to hit auctions and estate sales and hope for a bike that somebody has had sitting around in their garage, full of 2 stroke gas that's been varnishing the innards for years. Then you'll get to know the inside of that engine pretty well as you clean all that crap out.
And what's with the 50mph? Are you racing this thing? I don't know if I've ever gotten up to 50mph on a dirt bike, but I'd guess that any mechanically sound 125cc can eventually get to 60 on a long, flat surface. Honda 125s claim a 60mph top speed.


Not just a ton of power and with the 4-strokes taking over the dirt bike world you should be able to get one at a pretty decent price.
Check your local dirt bike shops for postings.
Good luck!







