okay im thinking of mounting a turbo on my yamha 225 and i wonder if its possible? man that would be fun to do.

 

Where are you going to get the parts from?...you would need a new exhaust, air box, and all of the lines. Anything is possible with enough money and time.

Some sort of supercharger might be easier to rig up...

If you want more power, why don't you just go to a bigger bike...or get something like a yamaha seca turbo?

 

I dont see how you could rig up a supercharger.....do they even have belts otehr than the main drive? isnt it all internal?
I think the turbo would easier, but would look weird, dont know how you would place it without it sticking out on one side of the bike

 

I have a Seca Turbo and it was tons of fun. The turbo was small and pressurized the 4 carbs thru an air box.

I have read that the injected bikes made better power and were a bit easier to do.

On a do it yourself, from reading long ago, I would go with pressurized intakes versus sucking thru the intake and then pressurizing. The magazines said it it was easier to get the carbs or intakes to work and there was less lag etc.

From looking at my old bike I would say if you already have dual exhaust the plumbing might be fairly straight forward. You would take all of the exhaust pipes from the head into a collector which feeds the turbo and then exhausts thru ONE muffler. The popoff goes thru the other muffler. the pressurized air from the turbo goes into an airbox which feeds the carbs or intake on the head. The air to the turbo goes thru the air filter and routes down under the bike(that's where the turbo is on my Seca).

Lots of fun, but why would you want to turbo a small bike? It would probably be more fun and maybe cost effective to find a larger used bike. Still, IF you can make up your own plumbing, it might make sense and be fun to do a small engine like that. The turbo unit itself would probably be tiny. I think the turbo on my Seca is about the size of a grapefruit. The Seca is a 650.

Good Luck,

Jim Henderson

 

What is interesting is that due to the weight penalty of the turbo, the non-turbo bike was just as fast as the turbo version.

It's going to take a itty bitty turbo running at high speed to see any gain. Even then a lot of money and time will have been invested in a machine that doesn't need a whole lot of top end speed.

 

You got a death wish or something?

 

Obviously you never road a CX-500 Turbo in the 80s! Definitely quicker then the standard CX-500. Only drawback was the bike had no rev limiter and could literally boost itself to bits (which is the reason Honda discontinued it!)...

 

The earlier turbo bikes were not much faster in the quarter mile than the same size normally aspirated bikes. Where the Turbo made the difference was at freeway speed, then you could walk away from most bikes smaller than say an 1100. The turbo was also great for long uphills or a heavy passenger. The rule of thumb was a turbo 650 had about the same power as a 1100. But real life was the 1100 got you off the line and then the turbo had to play catchup. The turbo bikes had the same hp as an 1100 but not the torque, at least not right away.

I once took my bike to over 140(yes wreckless menace to society so sue me) and it scared the heck out of me. Man things comeup fast. The hardest part was letting off the throttle. Once you let go of the throttle, the boost came off and the engine compression braking was a beach.

I once had my brother on back, he weighed about 200 and I weighed about 230. We were on the freeway going maybe 60. A guy in a Porche 911 wanted to play. I stupidly did too. So I goosed it. My brother almost slid off the seat and the front of the bike lifted up on the shocks almost off the ground. We blew that poor Porche away. Yeah yeah I know late 70s early 80s Porches were dogs but still was fun.

I regularly got 47mpg on the bike. Of the three main turbo bikes(Honda650, Yamaha650 and Kawasaki750), the Yammi was the slowest, Kawi was fastest but they had a year or two to learn from the mistakes of Yammah and Honda. I believe both the Honda and Kawi were injected. I still have my bike in the garage. One of these days I need to get new tires and put the carbs back on and play. Only has 25K on it.

Course the old bikes are nothing like the modern rockets you can get now. I think a turbo on a modern street bike would be suicidal.

Oh and to keep it Ford related, the bike was financed thru Ford Motor. Back then Ford and Yammaha had a kind of marketing partnership going.

Just my experience,

Jim Henderson

 

hey so it might be possible to mount a turbo then? the bike has plenty of power for me but i thought it might be fun. i wonder if i an get a turbo off a sea and put it on mine? im never going to get another bike for a long time anyway my bike is a gift so its really sentimental to me as well.plus i learned to ride on it and im happy with it!

 

If I understand you right, you want to use a turbo off a Seca? I bet the Seca turbo is too large for your 250. I am guessing here, I don't think the smaller engine will put out enough exhaust fast enough to get enough boost fast enough out of the turbo. Like I said before, you will need a smaller turbo, my guess is the size of a walnut ;^).

You have to match the size of turbo to the engine otherwise you get inadequate boost and turbo lag if it is too big, or you run out of breath at the high end if it is too small.

Good Luck,

Jim Henderson

 

thanks jim. for know the projet doesant seem doable for me.

 

it's posible, there ade alot of kits available. The hayabusa is an animal to begin with then add some boost, and some NO2 and of course udate the life insurance. But yo need to get the exhaust in and out of the turbo get intake air through it and a good supply of oil. And remember to let it spool down after you stop before shutting it off. Those spins at riddiculous speeds and most people turn the car off and walk away not thinking that they just shut the oil off to this super high speed fan. good luck and keep us posted.

 

better yet skip the crappy internal pist driven engine and just runt the turbine. checkout this bike at http://www.marineturbine.com/ and then click superbike brochure.