crank alinement timing issue

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TonupKid52
Posts: 57
Joined: Thu Nov 10, 2016 12:09 pm
Location: norwich. norfolk

crank alinement timing issue

Post by TonupKid52 »

Hi Guys Need help Trying to time my gt550L 74 Had the crank rebuilt seals bearings. Trying to time up the engine. Had it runing but left cyclinder
not firing as it should. new jets orig not blocked carb/[choke new] all new bits inside. float levels ok. if i time up left and then try to do the center/right cyclinders the points dont go round enough to time up.timed with dial buzzer. thinking crank not right? how to check?
May be doing something wrong May have tunnel vision doing same thing.
Any Thoughts PLEASE.
PS its denso
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Alan H
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Joined: Fri Aug 05, 2011 6:38 am
Location: Wombwell, Republic of South Yorkshire

Re: crank alinement timing issue

Post by Alan H »

First of all fit the correct points. Then gap and time left, centre and right points. Details posted elsewhere....
If you don't set the points gap first (14 thou at highest cam point, which is just AFTER tdc), you'll never get the points to open at the correct time - when the line on the propeller lines up with the static mark.
THEN LEAVE THE MAIN BACK PLATE ALONE.
Time the centre on the centre points, there's 2 adjustments - one for the gap, t'other for rotation.
Then do the right one similarly to the centre method.
Proof that four strokes are over complicated
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rodent
Posts: 418
Joined: Sat Feb 17, 2018 10:22 pm
Location: Sunbury

Re: crank alinement timing issue

Post by rodent »

You don't have some of this going on do you?

Image
TonupKid52
Posts: 57
Joined: Thu Nov 10, 2016 12:09 pm
Location: norwich. norfolk

Re: crank alinement timing issue

Post by TonupKid52 »

Hi Alan trying to time as your info, A Question are the kokusain points different to denso [cam lifting on points]. dont know if the person i bought denso points from sold me kokusain points. as having trouble with points closing or opening when moving a/r plate ??
Hope you can help
Ray
TonupKid52
Posts: 57
Joined: Thu Nov 10, 2016 12:09 pm
Location: norwich. norfolk

Re: crank alinement timing issue

Post by TonupKid52 »

Hi Rodent Thanks for info but do have the wires in right place. not as photo.
thanks Ray
TonupKid52
Posts: 57
Joined: Thu Nov 10, 2016 12:09 pm
Location: norwich. norfolk

Re: crank alinement timing issue

Post by TonupKid52 »

Hi Alan Just measured the lift on all points right and center are 7mm the left are 8mm. WRONG POINTS SOLD ME.
this is why i'am having trouble with timing the left cyclinder....
Will order the right points for DENSO must have been sold Kokusan..

Do you know if this is the case 1mm differance?

Regards Ray
TonupKid52
Posts: 57
Joined: Thu Nov 10, 2016 12:09 pm
Location: norwich. norfolk

Re: crank alinement timing issue

Post by TonupKid52 »

Hi Guys Update on my problem, Wrong points, and float level out. This was the problem on sorting not running on left pot.
Now running on all cyclinders, and ticking over. took her for a run and great to be on the road and riding.
stay safe everyone.
Ray.
PS. thanks for all help.
barney01
Posts: 3118
Joined: Wed Sep 26, 2012 7:33 pm
Location: Prestatyn.Wales

Re: crank alinement timing issue

Post by barney01 »

Great news :D result!
NO SMOKE .......NO POKE
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Alan H
Posts: 12104
Joined: Fri Aug 05, 2011 6:38 am
Location: Wombwell, Republic of South Yorkshire

Re: crank alinement timing issue

Post by Alan H »

Great news, glad it's sorted.
It shows that we must make sure that we fit like for like - not just 'near enough' - carbs and other parts too.
Original are always best.
Even the Denso/Kokusan points cams are different which alters the dwell of the points so the condensers don't charge correctly and affect the spark generation process.
Proof that four strokes are over complicated
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