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Griso 1100 does not start when it is hot

Cantaloop

Cantaloop

Just got it firing!
Joined
Aug 14, 2011
Messages
19
Location
Zuelpich, Germany
My GRiSO does not like hot weather. If the temperature are above 25 Degrees Celsius, the GRiSO does not crank. I already cleaned the battery poles, changed the battery, cleaned the ground contact and the start switch. Now I like to follow your advice and add a stronger power line to the battery and the relais. But I dont know which line to cut. Some are talking about red tiny cables, or green red ones, or yellow... Which colour is the right one?


The Green/Orange one is thicker...

Please help me.... which color is correct to add an aditional power line? Weather is hot in Germany. I do not want to walk because my GRiSO does not work.
 
The schematic looks like green red. To confirm, it comes from Fuse C (the middle one), the 20 amp fuse in the fuse block. You can use an ohm meter to verify after you remove the fuse. It that doesn't do the trick, the starter arm/Bendix assembly may need cleaning. There are posts on that on this forum.
 
Differing opinions, I did the "startus interruptus" cable fix - no cutting--(mph cycles) on my G1100 but it was probably my weak battery. Now I've learned that it may be the tiny red solenoid wire is undersized for the short but big amp-draw of the solenoid when starting. So being a bit of a Boy Scout I'm going to increase the size of the red wire to an 18 gauge.

As an aside a V50-III that my son and I resurrected a few years ago had the same problem and it ended up being a nearly rusted shut starter armature. We found the problem taking the starter apart. The V50 had spent to many years outside and water got into the starter motor, seeped to the bottom and rusted. The bike would start when cold but not when hot. I figured due to thermal expansion. We ended up putting a new starter on it which cured the problem.
 
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