Sprrint 1050 starting problem

[Crowman]

Hi All

I had a search through the threads but couldn't find the same problem, so thought I'd ask. My 05 sprint has developed an intermitant starting problem, the starter motor isn't turning, no solenoid noise, nothing, and then sometimes it will start OK. Battery is less than a year old and fully charged. I'm assuming it's probably one of the cutout switches, I've wiggled wires & sprayed WD40 in all the right places, but no change. Any suggestions?

[Bruce C]

Have you physically removed the clutch safety switch from its holder and sprayed contact cleaner onto the visible/exposed contacts??

[DEcosse]

Key-switch is also relatively common problem - broken solder pad on the switch plate, or broken wire in the harness.
Grab the key-switch harness & move it around & see what happens.

[uraberg]

When I bought mine, it had the same problem. It turned out that the pin that drives the clutch switch had worn a little on the lever. I rotated it a bit, greased it up, and it has been working fine ever since.

[Crowman]

Thanks for the tips guys, I did check/WD40 the clutch switch as it was my prime suspect. The last mod I've made was to fit the Triumph adjustable levers, so I wondered if it could be to do with that, but with the switch removed and pressed all the way home, it still didn't want to start. I'll check the main switch next. Would the TuneECU software & cable be any help I wonder?

[UlsterSpud]

Try setting your clutch lever at maximum span (# 6 on a Pazzo lever, likely the same on the Triumph one) to allow the plunger to extend fully with the clutch lever pulled. This is a plunger out - not in - switch.

[DEcosse]

Originally Posted by Crowman

....but with the switch removed and pressed all the way home, it still didn't want to start. ...

That is wrong way - the switch is closed when the pin is extended, not depressed.
After-market levers can definitely cause the problem - filing a few mm off the end of the pin will make it work across the span range.

[ontarget]

Originally Posted by UlsterSpud

Try setting your clutch lever at maximum span (# 6 on a Pazzo lever, likely the same on the Triumph one) to allow the plunger to extend fully with the clutch lever pulled. This is a plunger out - not in - switch.

I think I have the same issue with mine. Pazzo levers, and I isolated the clutch switch as the problem. Unfortunately, the switch pieces are now in a baggie, and I have to figure out how they go back together again. Did I mention that there is a spring in there? Lucky for me, I think I have all the pieces. I have been starting her by squeezing the contact leads, then separating them to ride. One more project for this winter. Ride safe, Dave

[ioneater]

Add the starter button and loose battery connections to the list, too. Personally have experienced both recently, though not simultaneously, resulting in intermittent starting.

Sent from my DROID RAZR

[Crowman]

Adjusting the span to 6 didn't help, neither did wiggling the harness by the main switch, the search goes on! (but it's getting a bit nippy in the garage, so it's not an intense search)