DiRt DeViL said:
After to talking to 2 coaches (including my son's) yesterday have reached the conclusion that a bar end or thumb shifter is the way to go.
Shims won't help, he just can't push the lever enough for it to shift.
My question now is, will a bar end shifter fit inside the end of the handlebar? I've never seen one installed on the drops of a road bike before.
Who sells individual bar end shifters? Don't want to buy a full set for just the left.
Yes, the bar-ends, as the name suggests, are designed to fit in the ends of ROAD handlebars.
Shimano & Campagnolo still make bar ends ... they are most frequently used, now, on TT bars ...
The Shimano bar-end can be used in index OR friction mode (this is more of an issue with the "right" hand bar-end) ... they are available from your local bike shop (whew, they will be expensive) or eBay (be judicious in your purchase ... an 8-speed set will probably cost $40, used ... a new 10-speed set at your LBS is in the $85+ range, I guess ... you can, also, opt for an OLDER SunTour bar-end lever which is friction only ... they generally have shorter levers).
Sometimes, you can find an individual one ...
At this point, if you are ABSOLUTELY certain the problem isn't with the front derailleur, itself (have you tried that front shifter on YOUR bike or any other, yet ... OR, a different front derailleur on your son's bike?), I would actually recommend a set of thumb shifters because they are cheaper (often, under $20US for a pair on eBay) ... but, the clamp is usually designed for a MTB handlebar, so unless you get one with a
cheaper, stamped clamp (vs. cast) & file away a bit, the thumb shifter will probably not fit on your son's handlebar.
If there are ANY tandem riders in your neck of the woods, you may find a single/orphan bar-end in their spare parts box.