if you want a scrambler thats going to smoke your dads p650 then get a used 400 4x4 and mod it,you can usually find them cheap and the mods are pretty cheap also..the modded 400 will easily beat the 650 and even beat the 700..

 

I don't know I think I would fly by your 400 looking at your Picture #12.... or is this what happens when you " oil injection removed "? What's the story on your oil injection, do you mix your gas? BTW I like both the scrammy and the Prairie, I just prefer the Prairie a little more because the scrammy just required a little more regular maintance.

 

yeah i would imagine you could fly by my machine if it was still like pic #12 but its not so good luck flying by lol..i removed the oil injection and now i pre mix,i did it to loose a few pounds and also so i dont have to worry about the injection system failing on me..

 

hello NovaKaw650 and MikeyBoyesq.

For a 2003 650 Prarie, look at part number 13048-1088 that connects to your front drive shaft. This cam mates with a similar cam on the 49022-1193 gear. As the torque requirement builds on the front wheels, this cam ramps up on the bevel gear until the spring force equals the force exerted on it from the torque transfer to the front drive. The end result is that as more torque is transfered, the more slip occurs up to the point where the cams ramp up so far that shoulders on the two parts contact. Yamaha has a similar mechanism for their 4x4s. I think this mechanism is used to reduce drive line shock, thats why they call it a cam damper. Incidently, this mechanism causes your front and rear wheels to come unlocked and locked whenever you turn a corner in 4wd. Add this to the normal driveline slop, and we might be surprised how much play happens between the front and rear wheels.

Probably the reason you don't notice it is the same reason the Polaris guys don't notice their wheel slip; that is, the slip is very small.
I hope this explains it better.
BryceGTX

 

I stand corrected, there is a buffer.

But I will maintain that it is still considered a direct connection 4x4 system. There is no slippage between the front and rear drives, no appreciable hesitation, no rotation of the rear drive before the front begins to pull, other than the normal driveline slack (of which the damper/buffer/shock protector is part of). It is a cam damper, and cannot move far enough apart to completely unlock.
This buffer never fully unlocks during turns or any other time; using this logic it would be unlocking constantly when in rough terrain that cause uneven loads to the front and back drives. If the load from cornering was enough to cause a complete slippage or unlocking, the 4x4 system would rarely ever pull any kind of load with the front tires.
Think of it as the rubber block between the hub and sprocket on some motorcycles, or the rubber damper between a small engine and hydraulic pump for a wood-splitter, etc. It's there to reduce driveline shock, not provide any kind of slippage or delayed engagement.

Too bad it didn't completely unlock, as BryceGTX has said. That would have saved some of the exploded front diffs that have happened over the years, lol.

Anyone that has been in 4x4 on hard ground, pulled in the diff lock and tried to turn a sharp corner will attest to the fact that ther is absolutely no slippage or unlocking effect.

 

I can attest to what Scotts' saying, locked in = straight ahead.

 

10-4 ON THAT I DONT THINK ARNOLD COULD TURN IT WHEN LOCKED IN. LOL[img]i/expressions/face-icon-small-happy.gif[/img]

 

There is a reason for this, they were deemed to have an "Unfair advantage".

 

ok,

my friend has a p650, bone stock. my scrambler has a K&N air filter, that is all. when we line up on pavement (good traction), in a 1/4, i pull aways strong the entire race. its not really a good race. in 500 ft im about 4-5 quads ahead. idk if its a bad prarie or what (that and he has 28in mudlites), but i just pull away strong the entire stretch. now if its muddy at all, he kills me, cuz i have bald back tires. its sad, cuz his foreman 450 walks away in a field due to spinout.

right now out of our riding group, the ONLY one that can pass me is that 450r...thats no fair [img]i/expressions/face-icon-small-wink.gif[/img]

but then again, if we line up, he doesnt get me till 3rd gear (stock 450r)

 

The 28" mudlites are killing the prairie. My 02' p650 will walk away from a BF750 w/27" mudlites. the added hight is messing with the belt drive and the add weight is eating up alot of his HP. Mudlites are good tires but light they are not!!! If he still has his stock oe tires and wheels have him switch them out and then race, I am sure it will be a different outcome