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November 2003

Update
Been working mainly on carbs and trying to get a nice fit on the bonnet. Can't seem to manage the latter but the carbs are now halfway done.

The plan with the carbs is to turn down the bellmouths to remove the need for a bonnet bulge or hole. With any luck I'll be able to rip off another one of Rich Miles' ideas and run a flat filter with a cold air supply.

Here's the reduction in height shown in the picture; no.1 is with the full rubber trumpet, no.2 is just the standard bellmouth and no.3 is with the bellmouth removed, when I've found someone that can turn down the bellmouths then the height will be just a few mm higher than no. 3.
Biggest problem whilst working on the carbs was trying to get screws out. They were so tightly done up and I think they welded rather used threadlock I managed to mangle several screws, snapped a screwdriver and even mashed my trusty impact driver !! How they managed to be this tight in fairly soft alloy heaven only knows... I can't see how they didn't rip the thread out. In the end the only way I could remove the tough ones was to drill off the heads and heat the remaining shank with a precision blowtorch (probably not advisable on petrol filled carbs ) and then a final attack with the pliers. Checkout the centre of this picture - that's the snapped off impact driver Gutted as I've removed many a tough screw with that

I decided to re-jet the carbs now rather than wait until I'd got the engine running. It was one of those things I knew I was going to do eventually so now's as good a time as any. Just as well I did as I found a hole into one of the vacuum chambers - this is where I'd modified the throttle linkage months back, hadn't noticed at the time - luckily it just needed a threadlocked, cut-down M5 bolt to plug it.

Here's some pics of the re-jet kit. It was simple enough to fit once the correct jets and things had been identified, the 4 or 5 line instructions refer to bits on the carbs by names that aren't used by Yamaha or Haynes !!

The TTS kit - does it look like £90's worth ? I'll let you know after a rolling road session Old on the left and new on the right - these are the main jets, going for 144's to start with. Old and new needles		Dinky little toy valves Feed me Seymour... feed ME NOW !!! Again, old and new...
I've also been improving the clutch by fitting a much tougher spring. It now feels much more like a clutch, even with the cable off

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