Search results

Couple of thoughts: Is it loaded up, it sounds like you found some excess fuel. What is the condition of the reeds? Very strange that it needed a new flywheel, why was it replaced and did it run with the new flywheel? Why did he sell it. The crank case drains, are they blocked off? Bill M.

Engines vibrate when they are rich. What is your current jetting? and screw settings. Other possibilities are cavitation, did you silicone seal the ride plate? Bill M. It is possible the pilot circuit is rich and when you close the throttle the engine's manifold vacuum suddenly increases and...

My guess is the impeller's leading is dinged up (a common cause on all brands). Oor the bottom of your head pipe has sand or a calcium deposit slowing down the flow. Bill M.

Has the pop-off been lowered?

I am assuming your engine is squealing not clanking. Visually inspect the pump. Remove the spark plugs, and inspect them. Rotate the engine by hand and try to identify what doesn't feel right. It should roll over smooth! Key spots to pay attention to is: pump, flywheel, starter, and crank...

That isn't even close to "too tight" Bill M. What was the geometric compression ratio? What kind of riding do you do? Did the piston pins slide out easy or stiff?

Most likely the cause of the detonation is your pipe/porting/impeller combo. Jetting could have been considered normal, but if your pipe/porting/impeller combo is not correct, it will increase the engines load and normal jetting will be lean. Although portions of it appear to be the piston...

I know this was already addressed, but peak fuel pump pressure is ~7.5psi and idle is near 3.5 psi, no matter what size fuel pump is used. You didn't list if your return line was modified, but if it was not, I would expect it to load up on idle. Bill M. 3.5 to 7.5psi from a small ~17cc...

Looking at SBT's web site, they only show SBT Brand (Chinese) needle and seats. It looks like they sell Genuine Mikuni rebuild kits for ~$58.00 each. Since you ride Yamaha, Try Protec. Not very good prices, but they have a lot of experience. Bill M. @Admin: Sorry for the link.

As I understand it, aftermarket Mikuni carb kits do not include that o-ring? I like testing pop-off inside Zip-Loc gallon size freezer bags. The pop-off should closely match the Mikuni pop-off table. You should test two different ways: normal way, unassembled. The 2nd test is fully...

Is there a combo that gives 200' with a 30' bdt? That may not be the original crank. Dallas built the 500cc engines for Eddie Lawson's wins at the ABC Super Bikers @ Carlsbad Ca.

Dallas is a better engine builder than a ~25' BDT. Perhaps the measurements didn't include the new piston height? Bill M.

According to Dallas, that style of porting was developed by Rick Burgett "Lumberjack" A factory Yamaha MX team rider in the late 70's. Dan used that port layout on the 93' World Tour XIr's, but I don't think it was used in the 94' XIr's. That exhaust port appears to be more aggressive than his...

Did you see this thread , where I attached information on using a peak voltage tester to determine the condition of the stator, pick-up and cdi. If you are interested in building the tester, I have Yamaha test specs. Bill M. Peak voltage testing is more reliable than an ohm test

Sounds like it is lean. Generally speaking, if you take apart the carbs a you don't find anything, you should look at the gaskets and gasket surfaces. Yamaha's have many common leaks. If everything is the same on both carb sets, the carb base gaskets may be different and leaking. Bill M...

How is your ski set-up? How long since the last rebuild. Did you check the crank for runout before installing the other flywheel. You may have rebuilt your carbs with less expensive parts, another possibility is the carbs you got from a friend still had the adapter plates on the carbs? Does...

The TS is the Kawasaki water taxi. They carry the ice chest and awning too and from the daily hangout, and they are also the thrasher ski you can let anyone ride. The most important maintenance feature (with any watercraft) is that it starts reliably every time. If you need any help with the...

You will need a good quality clear silicone, not ultra silicone or silicone based caulking. If you are using a 3oz. tube from your local auto parts store, plan on using the whole tube. I prefer to use 11oz. cartridge and gun. You will also need WD-40, a black sharpie, a roll of paper towels...

The Skat 16 degree impeller is one of those parts you find on a shelf, instead of in a ski, because it is a pos. The original owner puts what doesn't work on a shelf until someone else thinks it is a good idea to sell that perfectly good "shelf part." I could make some money! Who cares if it a...

I don't know why but all my doctors and the neurologist stayed away from the P word until I was shaking on the left and right sides. What other treatments are out there besides Carbidopa-Levodopa? Bill M.