This is the last post for this current project and I thought I would give you a final update on how everything went.
On my last post I explaned how I was chasing around the carb jetting problem and getting how worried I was about fuel consumption due to the large jets needed, this turned out to be a red herring
I spent the past couple of months chasing round a carb problem while riding the bike out and about. I could either get it running well in the lower throttle settings or get it running at high to full throttle, but never both. It turns out that the pressure relief valve isnt mating with the plenum properly allowing it to hold pressure ok, but it appears not to seat properly under vacuum.
Discovered this a few days ago when I carried out a risky test ride. Jetted the carb the same as I had it last year, started and ran it on choke untill I got up to speed took the choke off and it flew like the wind, accelerated faster than my old GS1000 used to.
Riding back home off the main road was frightenly interesting juggling the choke to get somewhere near a running mixture while being very careful with my quick acting throttle on a supercharged engine that was badly surging along with multiple huge very loud plenum explosions.
I have made a new end plate and everything is sorted now.
The following day I had another problem which meant more ongoing improvments and modifications to the bike. The supercharger extension shaft unscrewed because a roll pin failed. Roll pin has now been replaced by a 4mm hardened steel pin.
I realised that there may have a few teething problems with this build as no one has done it before. Im slowly getting on top of all the weak points now. Carburettor problems sorted now and runs equally well with the supercharger connected or not (although its slower)
The bike is now fully operational and rides better than I hoped, no reving needed to pull away just slip the clutch at idle and pull away, amazing acceleration and top speed of 130+. In normal riding the engine is a lot cooler that the last few years due to the low compression and standard cam, obviously it will run hotter if Im winding open the throttle a lot as it will be building boost.
The bikes performance is all I have wanted in an engine, perfect for a slow lazy ride around the forest roads with almost no strain on the engine with the added bonus of modern motorcycle performance available when I need it.
We went for a ride on Sunday 60 miles of mixed forest roads and main roads, started off apprihensive wondering if it will be ok but after the first 10 miles I was fully confident it was a wonderful ride and great weather. Finished off at a bikers meeting spot and had a huge crowd admiring the bike and supercharger
short video here....
