Recent content by APE Dustin

You won't gain enough from the swap to warrant doing it. Suzuki made the exhaust cam a lot larger on the Gen 2 motor. Stock intake has .354" lift and the exhaust has .338" lift. You are better off putting a larger cam on the intake side only or if you have a built up motor then put a set of...

Stock intake cam on the exhaust won't do much for the 2008 motors as Suzuki caught on and made the exhaust cam bigger. You could put a set of cams in it and go with some higher compression pistons.

It is called a pro-cut undercutting. It is where you remove half the engagment dogs for easier engagement. Heres some before and after pics of a Hayabusa trans that had the pro-cut done on it. Before After

Wrong thread. Please Delete.

The reason that we have seen them cracking is because Suzuki cut out the windage windows in the bottom of the cylinder block. The block isn't as strong because it doesn't have the support from the full round cylinders. Like Pat said from what we have seen about 5% of them are cracking.

That depends on who you ask and who builds the motor. I know some people are running 1507s on the street with no problems, but if it were my bike I wouldn't want to go that big for normal street riding, but that is just me.

There you go. That is the process of undercutting and how it works. Here is a picture of a gear that is worn and needs to be hardwelded back up the original spec. You can see in the pic that the dogs have rounded and are not square cut anymore and since because they became rounded it slipped...

I would say either 1397 or 1441 if it is mainly going to be street ridden. With the 1507 you might run into other problems as far as heat issues and starting problems.

I will see if I have a gear set that needs to be welded and see if I can take a picture for you so that you kinda know what your looking for.

sounds like it might be the same problem. What happens is the engagement dogs wear and they don't hold together anymore, so it causes the gears to jump out of gear or to skip.

That is a very common problem on the Busa. All you need to do is have it undercut and if it is already starting to jump out of gear then they engagement dogs are probably going to have to be hardwelded. After you get the gears undercut then you shouldn't have the problem anymore :thumbsup:

One note on mixing the stock and HD springs. If you do decide to do this you want to make sure that you alternate the two springs. Run one stock then one HD and so on and so forth. If you don't do this then there is a chance that you will warp the pressure plate.

whenever you modify the crank it needs to be balanced. As far as the fuel pump goes it doesn't sound like it is a fuel problem, unless you changed anything else while you did the crank. You can always take it to a dyno tuner and take a look at the air fuel mixture and see where you are at that...

Did your mechanic balance the crankshaft after he removed the counter balance gear?

It's no problem. You wouldn't believe what some people think my name is when I answer the phone. In most cases you don't need new gears you just need to have them welded back up to spec and then undercut.