How can I make a good start?
My 2001 Aprilia Falco has 25,000 miles on the clock and refuses to start unless I prime the carbs with Easy Start. I have changed the fuel pump and checked the fuel pressure, injectors and cam sensor are all OK. David Davis, email
Answered by Griff Woolley, Aprilia Performance I’ve seen this behaviour a few times where previous owners think that a good service means keeping the chain clean! You need to check that your valve clearances are correct and part of the service schedule on the Falco is to correct the carbon monoxide levels. If this is neglected, the same symptoms arise. If that doesn’t cure it, it’s definitely worth doing a compression check on the motor.
The brakes on my Triumph Sprint ST are still binding after a full caliper refurb and brake master cylinder refurb. I have noticed a slight gap between the left hand fork and spacer, so I think something isn’t aligning. Nick, email
Answered by Clive Wood, Clive Wood Triumph The ‘gap’ you mention is perfectly normal. The wheel spindle tightens on one fork, then two clamps on the other leg hold the spindle in place. That design means it’s not possible to overtighten the spindle and pull the forks together. The procedure is to tighten that one fork, then pump the forks up and down to encourage it to be lined up before tightening the clamps on the other fork.
If that’s done OK I think the problem is still around the calipers. The pistons should glide in and out smoothly. If not, it’s most likely to be corrosion against the back of the dust seals, which needs scraping out. Don’t be tempted to have a go around the main piston seals as you’ll wreck the calipers.
The other possible cause is the grease you’ve used during the reassembly. Red rubber grease is the only suitable one. Any other type, will make the rubber components swell.