Which Cam for the Mod

I am about to order the 450 exhaust cam and was just wondering which brand is the best. I have heard good and bad about hot cams but not a whole lot on ordering directly from yamaha. I will be doing this mod on a '02 426. Are there any other dealers that sell something different than the hot cam.

For the money the stock Yz-450 cam is cheaper, and no one has complained or mentioned any problems with using it. I've used Hot Cams in both my 426 and my 450 with zero problems. What problems have you heard about the Hot Cams?

Yamaha. According to several, the 450 cam produces a very wide, flat power curve when used in the 426.

I also just called a motorcycle mechanic who said he would install the cam for $70. Is it worth this or should I put it in myself. The money thing didn't bother me but he said it would take a week to get to it.

If you have to ask the question, you may want the mechanic to install it for you. It's not hard, but you'll need tools and know-how. I'm not trying to be negative, but if you've never did a cam before it could be a costly experience.

I went with the HotCams only because I couldnt be bothered to screw around with improper timing marks, but if you want to save a few bucks then go with the yamaha cam. If your having your mechanic install it anyhow the timing marks wont much matter to you.

I've got the Hot Cams, but you really need to buy both cams to really feel the performance difference. Installation is a snap, be prepared to buy some shims, and a quality inch pound torque wrench.

I would recommend the Yamaha cam. It costs less, improves the power of the 426 (in most people's opinion) and has zero reported problems. I really can't see any good reason for going with the Hot Cams setup.

As far as doing it yourself or having a mechanic do it, I would say if you are an average mechanic with the right tools, you should have no trouble. It's really not very hard for anyone with the right tools and an average mechanical aptitude. If you are unsure, I would look through the owner's manual and make sure you understand and are comfortable with the procedure for removing and installing the cams. When it comes time to do it regardless of who does it (you or a mechanic) I would make sure to follow the instructions in the cam installation PDF. It is very helpfull. Here's a link to the PDF. PDF Link

Good Luck!

I would recommend the Yamaha cam. It costs less, improves the power of the 426 (in most people's opinion) and has zero reported problems. I really can't see any good reason for going with the Hot Cams setup.

I agree........except that if he does install it himself the HotCam is much easier to set up, being that the timing marks are spot on unlike the 450 cam. What it really comes down to is wether $$ is an issue since the HotCam is a bit overpriced in comparison.

I went hotcams because, though I want decompression function now, I always want more power later, be it my car, my truck, my bike or my blender. With hotcams, I can buy the intake later for a mild boost. Would the 450 intake cam improve it? I don't know. I thought the sprocket was smaller also. No problem with just he exhaust, but with both, I don't know. I think the 450 has a smaller chain (less links). This is partly due to a shorter cylinder head. The hotcams give a whisker more lift If I'm not mistaken. I don't fault a guy for going either way. Both cams have produced only happy owners from what I have seen. Good luck and safe riding.

I would say the Yamaha cam. Installation is easy (even without timing marks), it's cheaper and the change in power is sweet. :):D

Thanks for all the replys. I did order a Yamaha cam that was just over $100. Got pricing on the hot cam anywhere from $175 to over$200. Can't wait, still don't know about the installation yet. Going into the guts of the motor is a little scary.

Here's a tip to make the timing of the OEM 450 cam a little simpler.

As mentioned the original timing mark on the 450 cam won't line up with the gasket flange on the head the way it was intended to because several thing about the two heads are different.

You need to set up the timing on the intake cam first, and then, with one mark on the exhaust cam at 9:00 and one at 12:00, there should 14 chain pins between the 12:00 mark on both cams. This can get tricky, because the chain on the exhaust side has to be tight, slack on the intake side, when you check the timing.

So, here's the tip. Your cams are currently timed right, no? Then zip-tie the chain to the intake sprocket before you remove the old exhaust cam. Then all you have to do is count 14 pins and drop the new one in. Double check both cams before you close it up, check your valve clearances, and you're done. :)

Excellent advice GrayRacer....where the heck were you in June 2003 when I need you? LOL

Here's a tip to make the timing of the OEM 450 cam a little simpler.

As mentioned the original timing mark on the 450 cam won't line up with the gasket flange on the head the way it was intended to because several thing about the two heads are different.

You need to set up the timing on the intake cam first, and then, with one mark on the exhaust cam at 9:00 and one at 12:00, there should 14 chain pins between the 12:00 mark on both cams. This can get tricky, because the chain on the exhaust side has to be tight, slack on the intake side, when you check the timing.

So, here's the tip. Your cams are currently timed right, no? Then zip-tie the chain to the intake sprocket before you remove the old exhaust cam. Then all you have to do is count 14 pins and drop the new one in. Double check both cams before you close it up, check your valve clearances, and you're done. :)

I have a question... Would a 426 that has the 450 cam timed like a 450 (using the 450 cam timing marks) run correctly or at all?

I have a question... Would a 426 that has the 450 cam timed like a 450 (using the 450 cam timing marks) run correctly or at all?

I got this one Gray Racer...it's an easy one......NO !!!!!!!!!!!!!!!!!

Thanks Satch..... I just wanted to make sure....Thanks for the quick reply! :)

I have ridden both the Yamaha cam'd bike and my WR with Hot Cams (both intake and exhaust)...There is no perceptible difference on the bottom to the mid range in power...but when you get to the big end of the powerband, there is no comparrison! The hotcams make more power hands down. For what it's worth, I picked up my HotCams on e-Bay for $235.00 for the pair.

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