valve clearance questions (started as zxr400 questions)

[benny13]

Originally Posted by chopper

have ya lifted the buckets on the fzx btw? arent they little bastards to get shims in and out of lol

can't do it, I'll have to take off the cams
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[chopper]

Originally Posted by 2buckledrims

The looser end of the scale will be good for a longer period of maintenance,you'll sacrifice a very slight bit of lift on the valves though

in comparison to what ? a race spec engine?

[benny13]

Originally Posted by 2buckledrims

The looser end of the scale will be good for a longer period of maintenance,you'll sacrifice a very slight bit of lift on the valves though

from the 4 that are out 2 are actually loose tolerance IN 0.11 - 0.20 and i was reading 0.20 - 0.25 the other 2 are tight 0.05 - 0.10. all in the inlet cams too, the exhaust are perfect

[chopper]

Originally Posted by benny13

can't do it, I'll have to take off the cams
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yup , them timing marks werent yams feckin best idea either
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what are ya using to turn the motor over btw?,hardly the special yam tool ? most use top gear and the back wheel but doubt thatll work with the motor out

[chopper]

Originally Posted by benny13

from the 4 that are out 2 are actually loose tolerance IN 0.11 - 0.20 and i was reading 0.20 - 0.25 the other 2 are tight.

you were getting 20-25 on an inlet?
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btw get better gauges dude ,dont be guessing in .05s

[2buckledrims]

Originally Posted by chopper

in comparison to what ? a race spec engine?

Some people(like myself) are quite particular about the performance of their bikes,i like to get the most i can from my engines.

[benny13]

Originally Posted by chopper

yup , them timing marks werent yams feckin best idea either
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what are ya using to turn the motor over btw?,hardly the special yam tool ? most use top gear and the back wheel but doubt thatll work with the motor out

yep, took your advice from a couple of months back putting it in top gear and I'm able to crank it with a rachet on the sprocket nut
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, I can loosen the nut again by a quick slap of me hand, handy out
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Originally Posted by chopper

you were getting 20-25 on an inlet?
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btw get better gauges dude ,dont be guessing in .05s

ya on clyinder 1 & 2, i'll post up the results tomorrow when i can change to pdf format
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[chopper]

Originally Posted by 2buckledrims

Some people(like myself) are quite particular about the performance of their bikes,i like to get the most i can from my engines.

its not a fuckin bros dave
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so with a bike thats known to tighten the clearances you would put the shims in to keep the clearances at the tightest?
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, you wouldnt notice the difference for a start ,i doubt a dyno would ,and this is a bike that could never handle the power it had in the first place
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.

it might be worth doing on a trackday tool if you happened to be doing the clearances anyway but if you need or could actualy use that type of performance gain you would be better off dialing in different cams
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[benny13]

Originally Posted by chopper

you were getting 20-25 on an inlet?
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btw get better gauges dude ,dont be guessing in .05s

was thinking that too, but I can only get my hands on shims that are in increments of .05mm, so doesn't really matter.

[chopper]

Originally Posted by benny13

yep, took your advice from a couple of months back putting it in top gear and I'm able to crank it with a rachet on the sprocket nut
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, I can loosen the nut again by a quick slap of me hand, handy out
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ya on clyinder 1 & 2, i'll post up the results tomorrow when i can change to pdf format
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id say thats as a result of a mechanic and not a result of wear
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let me know what size shims it has if ya lift the buckets
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[benny13]

Originally Posted by chopper

id say thats as a result of a mechanic and not a result of wear
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let me know what size shims it has if ya lift the buckets
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sound
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[chopper]

Originally Posted by eddiegeary

sent to bike away to be fixed and what has come back is that the cam and followers are worn, i have been advised to get a second hand engine but im just sick to death of throwing money at this bike

the zxr?

[2buckledrims]

Originally Posted by chopper

its not a fuckin bros dave
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so with a bike thats known to tighten the clearances you would put the shims in to keep the clearances at the tightest?
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, you wouldnt notice the difference for a start ,i doubt a dyno would ,and this is a bike that could never handle the power it had in the first place
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.

it might be worth doing on a trackday tool if you happened to be doing the clearances anyway but if you need or could actualy use that type of performance gain you would be better off dialing in different cams
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Legendary reply!!!

Nothing speaks like experience so there you have it
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Seriously though i don't put me own bikes at their tightest,ill sit them at halfway....givus a loan of a degree wheel ya bollox
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[benny13]

can't load up the pdf format so here's the readings
I duuno, i'd say i'd get away with swapping the 4 out on the inlets?? I'll take them out tonight and see the measurements stamped on them.

Tolerance IN 0.11 - 0.20 EX 0.21 - 0.30

Yamaha FZX750 18-Jul-2011
(From right to left)
Clyinder#1
IN
1 0.05 – 0.10 +0.10(0.05)
2 0.10 – 0.15 -
3 0.20 – 0.25 -0.10(0.05)

EX
1 0.15 – 0.20 +0.10(0.05)
2 0.15 – 0.20 +0.10(0.05)

Clyinder#2
IN
1 0.05 – 0.10 +0.10(0.05)
2 0.10 – 0.15 -
3 0.15 – 0.20 -

EX
1 0.15 – 0.20 +0.10(0.05)
2 0.20 – 0.25 -

Clyinder#3
IN
1 0.10 – 0.15 -
2 0.10 – 0.15 -
3 0.10 – 0.15 -

EX
1 0.20 – 0.25 -
2 0.20 – 0.25 -

Clyinder#4
IN
1 0.20 – 0.25 -0.10(0.05)
2 0.15 – 0.20 -
3 0.15 – 0.20 -

EX
1 0.20 – 0.25 -
2 0.20 – 0.25 -

[chopper]

me head hurts thinking from right to left there lol.
you may take em out and see what size the shims are before thinking they might swap.
be intresting to see what size the loose shims are

[benny13]

Originally Posted by chopper

me head hurts thinking from right to left there lol.
you may take em out and see what size the shims are before thinking they might swap.
be intresting to see what size the loose shims are

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that was only for me when i'm adjusting them, 1 to 3 looking in from exhaust to inlet
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I'll take them out tonight and see
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[Colonel Matterson]

1. is all the shims the same?
2. say no matter Yamaha or Honda?
3. or like all Yamaha has one type ?
4. or every bike uses different type of shims
5. is "shim" means adjusting pad?

[Blanka]

is it unusual to have 5 valves in one cylinder? the head looks weird
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[benny13]

Originally Posted by floo

1. is all the shims the same?
2. say no matter Yamaha or Honda?
3. or like all Yamaha has one type ?
4. or every bike uses different type of shims
5. is "shim" means adjusting pad?

as in, all 5 valves per cylinder in my case, then yes(edit-diameter the same, thickness is different of each shim)
no
no
yes(as in diameter and thickness)
yes

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[benny13]

Originally Posted by Blanka

is it unusual to have 5 valves in one cylinder? the head looks weird
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go on the genesis
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