Author Topic: Help Please: Timing Question  (Read 775 times)

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IT400C

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Help Please: Timing Question
« on: September 15, 2012, 01:38:29 am »
I want to pick the forum's collective brain about a timing problem I experienced earlier in the year.

I'd just refitted some rewound electrics to one of my IT400C's.  As I didn't have a dial gauge at the time, I set the timing using the verniers down the plughole method.

I then took the bike to a vinduro.  It was march, and a very hot day in south east Queensland.

It was about a 25 minute loop, and for about 20 minutes of that loop the bike wouldn't rev out at all.  It still had a decent mid-range, but coughed and spluttered whenever I tried to get onto the main jet.

Then, once everything was getting very hot it would start to rev properly.

I recently checked the timing with a dial gauge and found it had actually been at about 2.3mm before top dead centre instead of the 2.7 mm it should have been. 

Would that have been enough to give the problem described above?

The bike had run like a dream with borrowed MX400 electrics on the previous ride...
« Last Edit: September 15, 2012, 01:42:44 am by IT400C »

Offline Lozza

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Re: Help Please: Timing Question
« Reply #1 on: September 15, 2012, 03:58:22 pm »
Sounds jetting related to me, and buy a timing light. That far retarded would have given great top end
Jesus only loves two strokes