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When my exhaust valve was about to go, it only started slowing down in speed, roughly 3-4 days before I knew it was time to open my wallet again. Since it happened  to me 4 times, I believe I have the experience to say that is what you can expect as a symptom for the exhaust cam issue.
After the cam job, speed was back to 85.

If top end is not quite there rollers or belt worn?
The 500 is more regal in acceleration than rocket like performance.
Factors to consider.

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So, not the regulator then? Or the alternator? That is quite a drop in voltage. Maybe the battery has had it.
If you take it to a battery place, they will put a load on it, and can tell you if the battery is healthy or not.

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Well, I went around to the workshop, and the consensus is that it is the head bolts are stretched.

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Hey good people.
I rode it for 1km and it overheated.
I waited 5 min, and carried on.
Starting was difficult.

I got it home.
3km ride .
Stripped off the plastic.
Took off the radiator cap.
no water to be seen.
I put 500ml antifreeze in(half a bottle).
Started.
Antifreeze blew out the inlet pipe like a volcano eruption!
I refilled, emptied the antifreeze bottle.
restarted. with difficulty.
Noted white smoke from exhaust.
Turned off engine.
refilled radiator as the level had dropped again.
cap on, attempted restart, and the overflow tank overflow pipe spewed antifreeze.

At this point, the conclusion is conclusive ;
crap job.

I am disappointed, but cant go there to express it fully.
I will talk to God about it instead.

So, back to the workshop  it goes.

Thanks CROSSBOLT.


BTW, the brakes are fine......


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It was ready for collection, but then........

The rear brakes were very spongy after fitting the refurbished caliper.
First round failed to get a decent pressure.
Second round was better, but still not  satisfactory.
Third round, pressure was aquired, but then the braided hose sprung a leak.
My handlebars are bare metal, and the brake hoses have been rusting.

I was told I must replace the complete length from cylinder to caliper, as it is one piece, but I am almost certain that there is a splitter under the fairing, so luckily it will be a much cheaper replacement.
In fact I have some hoses from the Kymco 250 I used to have, so the fix will be free if the hose is not too long.

Here's hoping.
Wish me luck.

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So close, so close!
one more day only, hopefully.

At the workshop my scoot was started today.
The mechanic had to fit a helicoil kind of thing into the engine body where a bolt had stripped.
He showed me how the temp was now lower than it used to be, than ever before.
Previously, the needle was in the middle, but now can definately be seen to be below the middle line.

The mechanic was unhappy with the exhaust front piece glowing red when revving up to about 4500-5000rpm.
He was saying that it should not do that, the bike is running too lean and this is probably why the heater on the O2 sensor had broken (twice).

So, I ran my Chinese engine code reader on it, It can reset codes and adjust co2 levels.

Now the questions :
Is the mechanic right or wrong about the red hot exhaust pipe where it comes out of the engine?
And about the heater on the O2 sensor dying twice?

lastly, The co2 levels.
Nodody at that workshop could say whether the adjusting + or - from the default 0.0 was the correct way to go.
Another way to say it ; does adjusting co2 level from 0.0 to 1.5 mean more oxygen, or more fuel,and the same with -, going from 0.0 to -3.0 mean less oxygen or less fuel?

The mechanic said I must get a CR9 plug, because the exhaust is getting so hot.
Your views.?



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yep, that cold start problem. I have a gel battery with higher CCA, and that has helped. To fix that cold start problem I replaced regulator, Starter, solenoid, and the alternator(or whatever they call that on a bike).
If you can park it inside a garage, then that first morning  start won't be so bad.
I also used to have a trickle charger running every night, but I find I don't need it anymore, since I got the gell battery.

I cant comment on high altitude riding, but mine is the AFI model (no carburettor).
I would have thought that the computer would compensate for the thin air.

How is uphill ridings, hills that are in town, and not on mountain ranges?


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