timing
04-10-2009, 05:13 PM
#2
jet wrench
Back Marker
Join Date: Jun 2007
Location: cowtown, CA
Posts: 175
Curious as to how you've determined your 180 out, and more so how it got that way...
Easiest way to change timing is to...
1) remove valve covers, timing plugs, spark plugs, etc...
2) put cyl needing change on TDC, cam lobes UP.
3) remove tension from cam change tensioner
4) remove one cam gear to release chain from cam sprockets
5) adjust timing as req'd
6) reset tensioner before turning over engine
Note: I found that with cam gear marks line perfectly level with the head, you will fall between the "F" and "FT" (or RT) marks, in the window.
7) repeat step 2-5 on second cyl, then triple check to make sure you got it correct!
8) close up and ride
The manual is avail in full in the knowledge base forum, I believe. Do not try without it.
The bolts on the cam gears are unusually soft, may want to buy some spares as well as some high temp locktite.
LB
Easiest way to change timing is to...
1) remove valve covers, timing plugs, spark plugs, etc...
2) put cyl needing change on TDC, cam lobes UP.
3) remove tension from cam change tensioner
4) remove one cam gear to release chain from cam sprockets
5) adjust timing as req'd
6) reset tensioner before turning over engine
Note: I found that with cam gear marks line perfectly level with the head, you will fall between the "F" and "FT" (or RT) marks, in the window.
7) repeat step 2-5 on second cyl, then triple check to make sure you got it correct!
8) close up and ride
The manual is avail in full in the knowledge base forum, I believe. Do not try without it.
The bolts on the cam gears are unusually soft, may want to buy some spares as well as some high temp locktite.
LB
Last edited by loserbaby; 04-10-2009 at 05:16 PM.
04-10-2009, 06:00 PM
#3
Senior Member
Superstock
Join Date: Jun 2006
Posts: 358
04-10-2009, 07:37 PM
#4
Senior Member
SuperSport
SuperSport
Join Date: Dec 2006
Location: Victoriaville, Quebec, Canada
Posts: 880
It won't change a thing, if both cams are 180° out they are right on, as long as they are 270° apart and that the engine runs fine.
Just turn the engine one full turn and the cams are back perfect lol
It's possible to fire both cylinders 90° apart, sounds funny but too much stress on the crank.
Just turn the engine one full turn and the cams are back perfect lol
It's possible to fire both cylinders 90° apart, sounds funny but too much stress on the crank.
04-10-2009, 09:42 PM
#6
Junior Member
Squid
Thread Starter
Join Date: Apr 2009
Location: barnsley.england
Posts: 19
timing
the last owner changed the back cct and reset the timing as soon as the bike gets to 5 or 6 thousand revs it starts to miss fire,up to that its smooth i thought at first it might have been the plugs i changed them also air filter even put on new carbs new cdi unit new plug leads, its the only thing i can think off unless anyone knows different the bike starts missing at roughly 90 mph ive had it on the dyno and its only 70 bhp and they said it was running rich so if there is someone out there that can help i will be very gratefull as ive tried everything cheers for all your help john. south yorkshire england.
04-10-2009, 09:47 PM
#7
jet wrench
Back Marker
Join Date: Jun 2007
Location: cowtown, CA
Posts: 175
confirm compression stroke on the affected cyl, and then follow the manual...
It is very clear, you turn anti-clockwise, direction of normal rotation.
BTW... does the bike run?
you haven't answered the question... what makes you think your 180 out? and what are your symptoms?
LB
04-10-2009, 10:13 PM
#8
Junior Member
Squid
Thread Starter
Join Date: Apr 2009
Location: barnsley.england
Posts: 19
miss fires
the symptons are when the bike starts it runs ok until you get to 5000 revs then it missfires it might not be the timing but ive checked and replaced plugs air filter new carbs, checked hoses plug leads, ijust carnt pin point the problem cheers john
04-11-2009, 03:48 AM
#9
Senior Member
SuperSport
SuperSport
Join Date: Dec 2006
Location: Victoriaville, Quebec, Canada
Posts: 880
It could be timing related, but maybe a tooth or two off.
I would call a bad spark on this one, I would take a timing gun and check for erratic spark at higher RPM.
Is it a 5000 RPM wall or is it worst under load or when you lug the engine ??
Did you R/R fail ??
Measure your voltage at idle and 4000 RPM.
I would call a bad spark on this one, I would take a timing gun and check for erratic spark at higher RPM.
Is it a 5000 RPM wall or is it worst under load or when you lug the engine ??
Did you R/R fail ??
Measure your voltage at idle and 4000 RPM.
04-13-2009, 07:23 AM
#11
2nd mouse gets the cheese
SuperBike
Join Date: Jan 2008
Location: Beaverton, OR
Posts: 1,697
I still think you need to check your valve timing on the rear cylinder. Its the easier cover to get off anyways. Start where you know someone else got their hands dirty and begin to check their work. CCT replacement is tricky and nearly impossible if you decide to just skip steps. Since you don't know the level of work the guy before did on it its time to check that.
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