how to set timming

CARLSON · 08-07-2009, 11:09 PM

i have a 2005 trx450.i just replaced the head.the timming mark on the right side is corect and the cam marks are correct.what should the flywheel be at t or f?

jfreed20 · 08-07-2009, 11:14 PM

Not sure what mark u use on the flywheel side.U can pop the spark plug out and use somthing to put on top of the
piston to see when its all the way up.Then set ur marks i use a bottle rocket and stick the wood end down the hole.

HinkleMotorsports · 08-07-2009, 11:14 PM

Quote:

i have a 2005 trx450.i just replaced the head.the timming mark on the right side is corect and the cam marks are correct.what should the flywheel be at t or f?[/b]

set it at "T"

want2bfast · 08-07-2009, 11:15 PM

dont worry about the flywheel. just set it from the right side.

HinkleMotorsports · 08-07-2009, 11:26 PM

Quote:

Not sure what mark u use on the flywheel side.U can pop the spark plug out and use somthing to put on top of the
piston to see when its all the way up.Then set ur marks i use a bottle rocket and stick the wood end down the hole.[/b]

altho that will work to a certain extent, The TDC (T) mark is very close to the FIRE (F) mark... so its a possibility to have it a tooth off... how ever I would try to stay away from shoving anything down in your spark plug hole, I pull the flywheel peep hole cover off, the crank bolt cover off, and adjust the timing accordingly with the cam

CARLSON · 08-07-2009, 11:32 PM

Quote:

Not sure what mark u use on the flywheel side.U can pop the spark plug out and use somthing to put on top of the
piston to see when its all the way up.Then set ur marks i use a bottle rocket and stick the wood end down the hole.[/b]

altho that will work to a certain extent, The TDC (T) mark is very close to the FIRE (F) mark... so its a possibility to have it a tooth off... how ever I would try to stay away from shoving anything down in your spark plug hole, I pull the flywheel peep hole cover off, the crank bolt cover off, and adjust the timing accordingly with the cam
[/b]

your saying to use both the t mark and the mark on the right side.it seems if you were to use just the mark on the right side you can have the timming 180 out?

HinkleMotorsports · 08-07-2009, 11:44 PM

Quote:

Not sure what mark u use on the flywheel side.U can pop the spark plug out and use somthing to put on top of the
piston to see when its all the way up.Then set ur marks i use a bottle rocket and stick the wood end down the hole.[/b]

altho that will work to a certain extent, The TDC (T) mark is very close to the FIRE (F) mark... so its a possibility to have it a tooth off... how ever I would try to stay away from shoving anything down in your spark plug hole, I pull the flywheel peep hole cover off, the crank bolt cover off, and adjust the timing accordingly with the cam
[/b]

your saying to use both the t mark and the mark on the right side.it seems if you were to use just the mark on the right side you can have the timming 180 out?
[/b]

cam lobes back... if the cam lobes are facing the front of the bike..... then you are 180 out

McCune · 08-08-2009, 12:43 AM

No such thing as 180 out on a one cylinder four stroke wasted spark engine !!

I never use the right side to time a 450r ! I always use the flywheel "T" mark ! Easy as pie and never an issue.

HinkleMotorsports · 08-08-2009, 12:47 AM

Quote:

No such thing as 180 out on a one cylinder four stroke wasted spark engine !!

I never use the right side to time a 450r ! I always use the flywheel "T" mark ! Easy as pie and never an issue.[/b]

you CAN have your cam 180 out.... which is what im talking about..... notice i said cam lobes

motox_rider695 · 08-08-2009, 07:48 PM

Quote:

No such thing as 180 out on a one cylinder four stroke wasted spark engine !!

I never use the right side to time a 450r ! I always use the flywheel "T" mark ! Easy as pie and never an issue.[/b]

you CAN have your cam 180 out.... which is what im talking about..... notice i said cam lobes
[/b]

X2, you can most deffinitly have your cam 180 out.... i found this out the hard way. Couldn't find a reason why my quad wouldn't start, took 2 hours to finally figure out the cam was off 180, after i felt like a dumbass, but now she runs n cant complain

450RRR · 08-08-2009, 09:31 PM

NEGATIVE...

you cannot have this machine 180* off on the valve timing...

reason? the spark fires at both the POWER STROKE.....and the EXHAUST STROKE...

hence the term "wasted spark engine"....

the spark fires each and every time the piston reaches TDC..... therefore it can NOT be 180* off....or 360* off depending on how you look at it....

HOWEVER....on a side note... it is nearly impossible to align the timing marks and complete this process when the lobes are facing forward/down on the bumpstick.... reason being.... you are now pressing on the valve springs... which makes it EXTREMELY difficult to rotate the engine to get at a TRUE TDC....

like Mccune said....the easiest / best method is to use the flywheel 'T' mark.... (the 'F' mark is the timing advance mark)..... however, the flywheel 'can' become misaligned due to a half moon key issue...... so I tend to use the crank gear TDC mark....

to each their own.....

McCune · 08-08-2009, 09:39 PM

Quote:

No such thing as 180 out on a one cylinder four stroke wasted spark engine !!

I never use the right side to time a 450r ! I always use the flywheel "T" mark ! Easy as pie and never an issue.[/b]

you CAN have your cam 180 out.... which is what im talking about..... notice i said cam lobes
[/b]

X2, you can most deffinitly have your cam 180 out.... i found this out the hard way. Couldn't find a reason why my quad wouldn't start, took 2 hours to finally figure out the cam was off 180, after i felt like a dumbass, but now she runs n cant complain
[/b]

LMAO X100 !!

motox_rider695 · 08-09-2009, 12:13 PM

Quote:

NEGATIVE...

you cannot have this machine 180* off on the valve timing...

reason? the spark fires at both the POWER STROKE.....and the EXHAUST STROKE...

hence the term "wasted spark engine"....

the spark fires each and every time the piston reaches TDC..... therefore it can NOT be 180* off....or 360* off depending on how you look at it....

HOWEVER....on a side note... it is nearly impossible to align the timing marks and complete this process when the lobes are facing forward/down on the bumpstick.... reason being.... you are now pressing on the valve springs... which makes it EXTREMELY difficult to rotate the engine to get at a TRUE TDC....

like Mccune said....the easiest / best method is to use the flywheel 'T' mark.... (the 'F' mark is the timing advance mark)..... however, the flywheel 'can' become misaligned due to a half moon key issue...... so I tend to use the crank gear TDC mark....

to each their own.....[/b]

wow, now i even feel more like a dumbass

450RRR · 08-09-2009, 09:02 PM

nah....

you were probably just a tooth off if your lobes were facing fwd/down... cuzz of the extreme pressure the valve springs puts on the engine...it is VERY difficult to time correctly this way....

once you put the piston at TDC...and the cam lobes are facing back/up.....you are no longer under any spring pressure and much much easier to time correctly...

jmho...Greg

r4nsack · 01-22-2012, 09:13 PM

what exactly do you "adjust" if everything doesnt line up? All ive seen people talk about is lining up notches but not what to do if they dont line up lol. And what about using a timing light..

08-07-2009, 11:14 PM	#2 (permalink)
jfreed20 250EX Rider Join Date: Sep 2008 Posts: 169	Not sure what mark u use on the flywheel side.U can pop the spark plug out and use somthing to put on top of the piston to see when its all the way up.Then set ur marks i use a bottle rocket and stick the wood end down the hole. __________________ 07 450ER HRC KIT RE 42.5mm FCR NO-TOIL AIR FILTER WHITE BROS E2 (I KNOW NEED DASA) R&D remote fuel screw MYCRON 4 TACH OUTERWEARS RE GEN 1 HEAD WEB 242/812

08-07-2009, 11:15 PM	#4 (permalink)
want2bfast Super Moderator Join Date: Oct 2005 Location: Everett, Wa Posts: 5,465	dont worry about the flywheel. just set it from the right side. __________________

08-08-2009, 09:31 PM	#11 (permalink)
450RRR 450R Veteran Join Date: Oct 2005 Location: Central Cali Posts: 10,711	NEGATIVE... you cannot have this machine 180* off on the valve timing... reason? the spark fires at both the POWER STROKE.....and the EXHAUST STROKE... hence the term "wasted spark engine".... the spark fires each and every time the piston reaches TDC..... therefore it can NOT be 180* off....or 360* off depending on how you look at it.... HOWEVER....on a side note... it is nearly impossible to align the timing marks and complete this process when the lobes are facing forward/down on the bumpstick.... reason being.... you are now pressing on the valve springs... which makes it EXTREMELY difficult to rotate the engine to get at a TRUE TDC.... like Mccune said....the easiest / best method is to use the flywheel 'T' mark.... (the 'F' mark is the timing advance mark)..... however, the flywheel 'can' become misaligned due to a half moon key issue...... so I tend to use the crank gear TDC mark.... to each their own..... __________________ 06 450ER... #3 (Dale lives on) 86TRX250R (mostly stock 66mm bore x 72mm stroke) for sale 86TRX250R (ESR310 72.5mm bore x 72mm stroke '298cc' fully modded) SOLD 88TRX250R (ESR330 77.5mm bore x 74mm stroker '345cc' fully modded) HRC kit (all but gone) Hot Cams stage III Okie porting w/ATP CV4 springs (36mm Ti/31mm) Venom/KBR N2O Porting w/KW springs (37mm/31mm) Venom/KBR 487 100mm 14.25:1 piston Cold Fusion Nitrous** Venom 'QP' pipe ESR Pro Series pipe ESR modded intake w/RAT stack 42mm Taper-Bored FCR Direct Drive clutch lockout, CR500 springs GT Thunder-Link w/Durablue Lowering Link Durablue Anti-Sway Bar Modded shock mounts Rage Modded Tranny Jetting/Carb: #168, #45slow, NGPR needle 3rd clip, #55 Leakjet, Pilot 2 turns out. Jetting/N2O: 22N/21F (22hp) *STU Comp Cut 21x12x8 (6) paddle 'Padla Brats' on Douglas Blue label 8x8..... Thanx to: Venom/KBR (Mixxer/Kam), Rage ATV (Dee), Sredum (Chris), and many ORG members

08-09-2009, 09:02 PM	#14 (permalink)
450RRR 450R Veteran Join Date: Oct 2005 Location: Central Cali Posts: 10,711	nah.... you were probably just a tooth off if your lobes were facing fwd/down... cuzz of the extreme pressure the valve springs puts on the engine...it is VERY difficult to time correctly this way.... once you put the piston at TDC...and the cam lobes are facing back/up.....you are no longer under any spring pressure and much much easier to time correctly... jmho...Greg __________________ 06 450ER... #3 (Dale lives on) 86TRX250R (mostly stock 66mm bore x 72mm stroke) for sale 86TRX250R (ESR310 72.5mm bore x 72mm stroke '298cc' fully modded) SOLD 88TRX250R (ESR330 77.5mm bore x 74mm stroker '345cc' fully modded) HRC kit (all but gone) Hot Cams stage III Okie porting w/ATP CV4 springs (36mm Ti/31mm) Venom/KBR N2O Porting w/KW springs (37mm/31mm) Venom/KBR 487 100mm 14.25:1 piston Cold Fusion Nitrous** Venom 'QP' pipe ESR Pro Series pipe ESR modded intake w/RAT stack 42mm Taper-Bored FCR Direct Drive clutch lockout, CR500 springs GT Thunder-Link w/Durablue Lowering Link Durablue Anti-Sway Bar Modded shock mounts Rage Modded Tranny Jetting/Carb: #168, #45slow, NGPR needle 3rd clip, #55 Leakjet, Pilot 2 turns out. Jetting/N2O: 22N/21F (22hp) *STU Comp Cut 21x12x8 (6) paddle 'Padla Brats' on Douglas Blue label 8x8..... Thanx to: Venom/KBR (Mixxer/Kam), Rage ATV (Dee), Sredum (Chris), and many ORG members

08-07-2009, 11:09 PM	#1 (permalink)
CARLSON TRX90 Rider Join Date: Jan 2006 Posts: 4	i have a 2005 trx450.i just replaced the head.the timming mark on the right side is corect and the cam marks are correct.what should the flywheel be at t or f?

08-08-2009, 12:43 AM	#8 (permalink)
McCune 250EX Rider Join Date: Feb 2006 Posts: 495	No such thing as 180 out on a one cylinder four stroke wasted spark engine !! I never use the right side to time a 450r ! I always use the flywheel "T" mark ! Easy as pie and never an issue.

01-22-2012, 09:13 PM	#15 (permalink)
r4nsack TRX90 Rider Join Date: Jan 2012 Posts: 90	what exactly do you "adjust" if everything doesnt line up? All ive seen people talk about is lining up notches but not what to do if they dont line up lol. And what about using a timing light..

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