MOTOG4 TURBO - Hooked the 'Busa pipe up.

Hooked up the Hayabusa exhaust can today and got the supercharger working somewhat using a thick rubber-band and a short tube with a grub-screw to extend the crank-axle stub, although this needs a lot of fine tuning before it'll spin well under engine power. Thought I'd give it a try anyway and couldn't wait to hear the new exhaust sound, but alas she wont fire up. There's no spark for some reason, so I'll have to wait until next weekend to get it sorted, shame.

To get the new exhaust on I chopped the old one off on the up-pipe, removed it completely from its mount under the seat and cut the small silencer off leaving the start of the truncated section as the end of the pipe. With a little shaping with a ball-hammer the truncated section slips perfectly into the 'Busa can and fits tightly into the smaller diameter pipe a few inches inside it. To get the cut pipe at the manifold over to the opposite side I added a new 6" section, using aluminium pipe and fixed it into place with a wealth of ally-tape, it'll be fine for this application.

MOTO G4 TURBO!!!

I've accrued a few natty parts lately so thought it was time to bring out the old MOTO G4 superbike and vamp it up with a sick new exhaust and some forced induction...

IHI Turbo from a diesel LDV van, has something like a 28mm impeller.

The exhaust turbine is stuffed so I've removed the exhaust-manifold completely and will replace the turbine with a small belt-pulley [to be driven off the crank/flywheel] - turning it into a rudimentary supercharger!

Exhaust silencer from a Suzuki Hayabusa (!) only a couple of years old. New owner replaced it with titanium and threw it in the skip...

Turbo bolted in position. Made a custom bracket from some angled billet-alloy and bolted it to the front fairing-bracket, so will probably need re-enforcing.

The exhaust isn't as heavy as it looks and bolts onto the rear fairing-bracket quite well, although fitting the Mac case back on will be tricky.

Just need to hook the belt up now, run a hose from the turbo to the carb-inlet and hook up the exhaust using metal flexi-pipe and probably lots of ally-tape. For you knowledgeable sceptics out there, I don't think the oil and coolant feed will be necessary, nor will the waste-gate fixture and setting make any difference - the turbo will only be spinning at crank speed. It'll look good and blow on the engine, but we're not going to see boost figures and besides, how much boost can this 49cc 2-stroke take?!