VintageVmax.com

Yes the reverse cam off of the newer Yamaha's will fit your secondary shaft. Start with N1 weights and the purple spring in the comet, you will need to clutch it to run at 9000-9250 rpm's. This should get you started..

Give AAen a call he is always very helpful with his products.

I don't think that is a strong enough for the HP or RPM of the 81 SRX, I would upgrade to a 102c, Polaris P85 or something like that.

The compression sounds a little low for that sled. Also the clutch should engage at 5000 rpm's, That 440 engine didn't make any power until about 6000 rpm's then you better hold on. They didn't come with round slide carbs so who knows what they are from or jetted like. It also used a 102C Comet not ...

Tyler If he doesn't want them please let me know, I will take them!! Thanks

Measure the bore size, the 82 500 had 42mm venture & 44 mm bore size, the 81 had 38mm venture.

YAMMIEGOD 3:16 wrote:jeff, i always said the vmax 540 won,t take a 440 srx. not than, not now and not in the future. i love to race one with my 540. lol. 3:16 (yammie tony)

Tony I just happen to know where there is a good running SRX!! We will have to get together some time and have some fun!!!

I have been so busy that I haven't even had a chance to even ride yet. Mine is still put away, the way it is going I doubt I will even get out this year..

Tony You have the correct handle & switch as far as the knob goes. The 85 & up had a 3 wire switch but every thing else was the same. The original 83 wasn't like the 81 82 SRX with the red rubber cap but just like the one you have on your sled. It is correct..

Yamaha listed the 83 at 452 lbs dry and the others at 472 lbs dry. I never weighed any but that is what Yamaha said.

Tony I am glad it is working out for you. Maybe we will see you at the Whiteout, we are going down Saturday what day are the drags? I hope to send my jugs out this summer to get replated, they have the Update porting done to them I had Swain Tech coat the piston doms and also the skirts, they look g...

I don't know if I will have mine out at all this year, I have to put a new lighting coil in it & I haven't had the time to do it. Hope to see you at the White-out in Febuary..

Couldn't you take one of the updated 81's and stamp the appropriate numbers in them. Just a thought.

Mark.. This is one of the way's I check them, it may not be the best but I think it is a very simple way. If the engine runs let it cool down and if you have pressure at the radiator cap then you probably have a good none leaking seal. if it leaks by the seal the pressure will just escape out the ge...

Mark you can't stay away from those 81's can you...lol