Just recently bought an 01 raptor for $1500 and I plan to use the motor, etc. in a mini-rail (ATK - all terrain kart) like the attached pic. What motor upgrades would be recommended? I plan to at least upgrade trans to 02. What other options are available for trans upgrade beside an 02 trans? ATK's weigh around 750-850 lbs dry.

Thanks for any info,
G.

all terrain kart

 

That thing would weight abit more than 1,000# wet with a driver. I would get a high comp piston(12:1), cam(stage 2) and a good exhaust. That would get that thing moving.

 

Nice rail ! Hey Nothing agaist raptors I own one But if it were me I would buy a 2 cyl sled motor at least a 700 like a polaris rmk for example and run the CVT trnasmision off the sled huge power range and Power to weight ratio is High a good 700 cc twin can produce 110 HP with out much work and then HANG ON

 

Cali: what would be a good sprocket combo to start with?

Thanks Outlaw. A lot of people are using the setup you described. I've driven both a cvt and shifter and I prefer shifting. Thats why I am using an atv motor versus a sled. Don't get me wrong, twice the horsies would be nice, but there's nothing like the feeling of shifting.

G.

 

I would go with a 12/40 or even a 12/41-42...that thing will be heavy and I dont think you will be going FAST, this gearing will prpbably put you in the 65-70mph range, with 21in tires. If you go with even bigger tires you would have to make more changes.

 

i doubt it would pull 65-70 without some significant mods. A stock rappy can only pull mid 70's, and if you factor in the extra weight and lower gearing i really doubt it'll be going 65-70, maybe 55-60.

 

Who is a good source for quality aftermarket engine parts? aftermarket clutch and trans?

Thanks,
G.

 

I think craycraft has GYT-R clutches, but Im not sure who you would have to go to to get an 02 trans

 

go to alba's web site and click the raptor and then motor mods..
they have an 01 to 02 tranny kit with all the fixins.

 

What about a yzf600, more power and revs, and lots of gears. what more could you ask for?
they hold up great in minisprints.