March 21, 2007

R100GS PD – latest progress

Follow-up to Balancing a Bing and other esoteric BMW motorcycle restoration rituals from Transversality - Robert O'Toole

With only a week and half before we leave for Spain, the bike is almost ready.

After fitting a new throttle cable, I couldn’t quite get the carb setup correct. Worse still, one of the cable kept jamming, and then jumping out of the holder at the twist grip end. To get it sorted quickly, I called on Phil the Boxerman Hawksley, the renowned BMW specialist from Leicester. Phil did a service at my house, for a very reasonable fee. He set up the carbs perfectly, as well as tightening the steering bearings to prevent the bar wobbles that I had been experiencing.

Proof of the quality of Phil’s work came on a ride down to Dorchester (to see Ted Simon). The bike ran well. On the way back, after a fast motorway dash from the south coast, I stopped at a petrol station with the counter saying that I had done 220 miles since the last full tank. I would normally expect to have to put in around 28 litres for 220 miles. Efficiency can be as low as 43 mpg on an old airhead GS at high speed. It most often makes about 45 mpg. On this ocassion, I was surprised to find that it had used much less fuel than expected. The bike ran at around 50 mpg at high speed on the motorway. Well tuned carbs? And perhaps a change of engine oil: Castrol GTX rather than the usual Castrol GP.

Since then it’s had a couple of new tyres fitted by the very helpful Behind Bars trail bike specialists in Kenilworth. Metzeler Tourance as usual, although I am considering a change. They also did an MOT. It passed with no problems.

The last few jobs to do:

  1. use some new bolts to secure the pannier rails to the subframe;
  2. re-attach the sump guard;
  3. find a small box to put next to the smaller than standard Hawker Odyssey battery;
  4. mount the panniers and tank bag.

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