Muncie

As a bonus bores look mint and have no lip no slop in pistons. Certainly sounds way happier really thumpy out the exhaust and snappy on the throttle. Still think it could benefit from electronic ignition as the rear cylinder seems to die off at a low idle it comes in and out probably a slightly sad coil. For now I'll just run a higher idle. Any geniuses know how i can make a coil on plug conversion?

Boom it runs! Took all the sharp edges out of inlet as well but overall these heads were mint! Lapping in valves took some work but did eventually come up really good. Started first pop normally takes some cranking. The part thats been attacked with the angry end was a hard edge that extended out really choking the exhaust. Once i had that opened up and smoothed out the rest of the port was actually pretty good, i opened up the port at the flange to match the exhaust and called it done.

Heads all stripped down stoked to find inlet is factory CNC ported (fuck yes) exhaust is a bit shit though, I'll tidy that up do a valve grind and put back together. Found the valve seats clearly weren't sealing well obviously has been left sitting for years and got some surface rust.

Well cant leave the house so why not rebuild and port heads on this. Its always had just enough compression to make some power but knew there was more in it.

@KimjonIm not sure if a cvt is neccessary or would actually live on this size engine they are heinously expensive! I was looking for one to fit the 1 1/8" inch shaft just the driver was nz$650 and had to come from states. A snow mobile type is more affordable and can take the power but are physically Hoooouge and need (driven side is like 10 inch) modifying to run on a lower revving non 2 stroke. For that cost i can fit 2x 18hp rated clutches and hopefully load engine up and build boost once it spools up its gonna be a party for sure!

Does a bit doesn't it? Where it is puts motor mount in center of chassis with the weight of the turbo etc it all feels pretty balanced. Still got to fit a belt drive in there, going to run a 1-1 timing belt to a jackshaft and a normal centrifugal clutch off that. Prefer the idea of getting whipped with a belt then gnawed at by a chain when something inevitably breaks. My other twin seems to lengthen chain then throw them, im sure this will do it as well hopefully a belt will smooth it out a bit.

Lots of room around non moving parts now the original wheels had chewed massive chunks out of sidewall of tyres from rubbing on bolt heads etc.

Bigs and littles. Looks a little extra stretched im experimenting with engine placement to get exhaust tucked in further.

1 down 1 to go! flipped the hub so more offset and redrilled for go kart bolt pattern. Still looks pretty good if anything looks more mental than before. Will run some go kart wide rears eventually but will stick with quad rims till its been running a while.

Could use Holley float bowl sight glasses chuck 2-3 in potentially smooth them flush with the tank could look cool and be functional

Decided to throw away almost all of the frame around engine and remake it in box section instead. Its like the frame was built by a blind furniture maker on a Friday nothing's square the welds are shit but the suspension and brackets are excellent! So I'll rescue the brackets and suspension and start again. Its a very basic shape so will take bugger all to fabricate and be nice and sturdy, when this engines doing its thing in anger it'll have as much power as a small car so i better not risk it ripping in half.

Think this will end up just in front of right rear wheel. Theres a nice empty spot there that needs filling.

Spent about an hour on this this morning. Oil pressure feed, done. Oil drain decided need to borrow a 1/4 tap to finish. Started cold side pipe to carby and played with pressurized fuel tank fittings.

Thats a Chinese knock off of the gx630 i think heaps of go fast parts available out of states engine is a Predator 670. They stick them in bloody Harley's!

mainly going blow through in case the turbo sucks i can just revert to naturally aspirated easily. Also dont want to have a hot pipe loaded with air and fuel just under my nads in case of a back fire.

Will either work or it wont cost nothing to try it fortunately. This or i need a rather expensive pump to make it work or a mess of check valves and a big float chamber.

A few people have asked how im going to fuel this..... An aircraft mechanic at work drew me up a sketch on a paper towel and i think its worth a nudge, essentially my fire extinguisher fuel tank is becoming a "rising rate fuel tank" ive got a -8 fitting on my compressor housing which will pressurize the tank and feed the fuel pump at boost pressure. The fuel pump will then add 1.5 -2psi to it keeping fuel from being blown back up the jet in the carb the float bowl will also need to be pressurized as well to make it work. Going to be Braided speedflow lines everywhere but im going for an Extreme! theme on this thing. I get the speed flow lines and fittings from the bin at work no good for the sky anymore but plenty of life in them for this kind of stuff.

Really looking forward to the first run of this one.

The second option is running right across engine to other side but the path is pretty much flat.....

Better look at these oil lines. I sparked her up with some fuel line and hose tails on pressure side of turbo just to flush the core out, ive had this turbo for bloody ages! I just let the drain dribble on the garage floor to purge any shit out. Now ive got a choice to make both of which require a hole in block there is a perfect oil drain at front of engine but the turbo is now at the back for packaging reasons a line would be to long and flat to run all the way to it i think. This seems like the logical choice but is probably below the sump level will this give me any issues?

Yeah mate these twins have full presurised oil systems both are fed under turbo not really visible to well.AN4 feed AN 6 Return, Return might be too small once turbo is spinning in anger time will tell no smoke or oil puddles yet.

Think i might just buy one of those anyway for a rainy day.

Hmmm I'd need 2 kits probably as well..... bugger it for now SU it'll be till i win lotto or stumble across a snotted motorcycle that can donate some bits.

Hmm wonder how bargain basement i could fuel inject it?

Speaking of which this is as close to new as it can get!