I’ve been reading quite a few threads here regarding piston slap issues in the Rotax V-twins .

With neglect & abuse aside , are these issues i’m reading about inherent problems within the design of these engines ?

I am looking at buying a rzr soon and am trying to get the pop up coupon on polaris website for free extended warranty . Does anyone have the promo code they are not going to use that they will send me ? Can I use someone else’s code ?

Thanks

Hey fellas I’m new to the site, can you tell me what kind of oil I can use besides the Honda oil for my rubicon deluxe, the dealer says Honda oil only but there has got to be something else that works on the hondamatics

Hey fellas I’m new to the site, can you tell me what kind of oil I can use besides the Honda oil for my rubicon deluxe, the dealer says Honda oil only but there has got to be something else that works on the hondamatics

I tore the top of the motor down and discovered that one of the 2 6mm bolts on the cylinder were broken off. The previous owner apparently broke it off and then put the bolt back in with silicone and didn’t fix it. So I looked around and somebody on here said get a left handed drill bit and drill it out. Did that but broke the bit off in the bolt and now I’m in a pickle. Any suggestions? Also tried to get a cobalt steel bit and drill through the bit and that’s not working.

My names Josh and I recently bought a 99 grizzly 600 4×4

Where’s a good place to find good upgrades like cdi box

I’ve got a 99 Yamaha Grizzly 600 4 by 4 there is oil or an oily substance leaking out of the bottom of the belt case what would be the problem just bought it a few months ago please help

Good day all, new member.
I have a 1989 350 Fourtrax and a 1995 400 Foreman.
Been riding for along time, in my 60’s now I started on 4×4’s, 74 Bronco with 38′ Monster Mudders, lockers, then a 86 Bronco, 35" All Terrains, which I re-built a 1969 429 cu in and adapted it to fit in the truck, made my own motor mounts etc.. I am a fairly good mechanic, Jack of all trades. Make my own tools if I have to, good at figuring mechanics out, and I am a private pilot.
Enough with the preamble so you get to know mw a little.

My 1989 350 Fourtrax is making some noises that I am having troubles isolating. The noise it makes is very similar to a rock caught in a disk brake on a so equipped vehicle, the 350 is not so equipped. The noise is only present when the ATV is in gear and moving and not all the time but seems to be getting worse.

What have I done to isolate the issue?
I have removed the Front driveshaft (between engine output shaft and front swingarm). I replaced the bearings on the front driveshaft a few years back. When I look at the front drive shaft all splines and bearings are in excellent condition, no issues there.
I removed the front drive shaft (from back of swingarm to differential input). The splines on the shaft are also in excellent condition, the u-joint has no play in it, functions normally. The shaft has only a nominal amount of rust on it in 27 years so there has been no moisture penetration in my opinion.
I have removed the rear swingarm. The rear driveshaft splines are also in excellent condition. The u-joint is good as well, no play, functions normally. The rear shaft also has nominal rust on the bare metal so I believe no water penetration here either.
The spines on the output shaft on the output gear case, both front and back are in excellent condition. I can spin the shaft and hear nothing and feel no abnormal grinding or roughness. There is no play in the output shaft.
If I run the engine and run through the gears in this state (driveshafts removed) I hear nothing but there is no load on the output shafts. I ran through the gears with only the front driveshaft and wheels connected and heard nothing but load was minimal as the ATV was off the ground.

The noise IMO is not coming from the swing arm bearings as the noise is not related the ATV flexing over terrain, rather coming from the turning of the drive train. I have had all four wheels off the ground as well and run through the gears with no noise but again, little load on the drivetrain as wheels are off the ground.

I would really appreciate any insights any members may have with regard to my screeching noise and isolating the fault. Right now I am thinking of putting it back together and trying again, maybe a rock fell out somewhere I did not see.
Thanks for taking the time reading this and considering any options I may have.

Hello everyone. Last night I decided to add a second smaller radiator on my front rack, much like a rad relocate kit. I had a heater kit lying around from a sxs, and a small electric motorcycle. I had to mod the heater kit a bit(pretty much cut it for better air flow and for the new fan). With suprise the stock brackets would allow me to bolt it to the 2 most forward 8mm bolt on the front rack(a little trimming of the brackets were nessesary). I did use spacers and longer bolts to mount it. For plumbing I ran the original top rad hose up to the top of the upper rad, then out of the bottom of the upper rad back to the upper of the lower factory rad. Because of the small size of the new fan I just tapped the power off the original fan and tested it before I soldered everything. I do plan on cleaning the mount up and adding a metal screen when I make a snorkel kit up for the kodiak in the next month or so. I heat cycled it a few times last night and I noticed a much shorter fan cycle time, which is a good sign. The second rad is approx half the size of the stock rad, but its twice as thick of the stock rad. Ive always wondered if this idea would work, so I gave it a try. Not to mention here in Canada a rad relocation kits is almost $300, and my idea was free lol. We are doing some good riding this weekend so ill keep you posted!

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