Those 3 millimeters are probably the area where the belt has touched the starter bendix... It's quite a common problem with race variators which push the belt up real high, so it's probably not so strange to see this occurring with a longer belt as well...
i think yoy may be right mono will keep an eye on it.
to be honist after all the mods done she dont seem much diffrent to when i just changed the variator and boss for a cheep set at £17.50 off ebay. and a race cdi. keep thinking weather to buy the multivator just to see if that does anything.
list of things done....
race cdi with ADJUSTABLE ignition curve...
cheep variator and boss...
roler weight set. at mo 5.5g...
torque spring 1500
clutch springs 1500
narkau hq drive belt...
leo vince exhaust....
after market air filter....
carb jet 90( plug chop is good but may try a 92 jet see if i can get perfect reading)...
just done oil change for fully sinthetic...
gear oil change...
new spark plug....
i think thats everthing
always leave engine running 10 min befor a ride.on take off its good to 20mph, then i have a slight incline up hill (but to look at its allmost flat ) it takes 1/4 mile to travle along this top speed is 30mph. then a junction so a near stop. another 1/4 mile gets to 30mph. another junction. the next step is a steep down hill slope 50 meters long at the start then is a good mile flat with a . on the flat it gets 45 mph ish. the rest is down hill steep. it gets 50mph.
in reverse coming back up the steep hill it does 20-27 max. on the flat 40-45, untill that short hill does 20-23mph the rest of the trip it gets 35-40.
im not expecting lots but hoped after all the mods that she would not go below 30mph( hoped when she got to 30 she would stay there.)
when i did the cdi and the boss it seemed almost the same as it does now( by that i meen i think its exactly the same ) been sort at talking my self into thinking its changed. am i missing somthing does this sound right?
rant over