Broke a valve while swapping chain tensioner *Updated 1st Post*

[sledge]

OEM replacement valve guides come with a slightly increased outside diameter. This is to compensate for the now slightly increased pilot hole diameter and the reduction in interference caused by knocking the old one out so in theory they shouldn't need knurling before fitting.

Its not been mentioned yet but you may as well check the spring lengths while they are off, especially if you have racked up the mles or are `rev-happy` I cant remember the service limit figures but they will be in the manual. I think its around 35mm for the inner and 40mm for the outer. Anything less means they have gone soft and must be replaced.

Note how the valve springs come off, there is a right way and a wrong way to fit them. The closer pitched turns must go towards the head. You may find a dab of paint on the upper (cam) side that's serves as an indicator.

Again its not been mentioned but its usual to coat the replacement valve with molybdenum or high temp grease before fitting it into the new guide, this helps it bed in.

[The Buddha]

" 3 angle cut is far better"

The valve still gets lapped, the extra angles is to smooth the flow from port to chamber and vice versa past the narrowest contact point of the valve face and seat.

They never truly lapped it, I saw them do iy a few times. No operation with valve in the seat.
They cut the seats.
They cut the valves.
They put some marker compound in the thing and put the valve in the seat and press it with their thumb, and look for contact ring.
Then, repeat the cutting if its not right.
They get machined to match - 
Cool.
Buddha.

[gsJack]

" 3 angle cut is far better"

The valve still gets lapped, the extra angles is to smooth the flow from port to chamber and vice versa past the narrowest contact point of the valve face and seat.

They never truly lapped it, I saw them do iy a few times. No operation with valve in the seat.
They cut the seats.
They cut the valves.
They put some marker compound in the thing and put the valve in the seat and press it with their thumb, and look for contact ring.
Then, repeat the cutting if its not right.
They get machined to match - 
Cool.
Buddha.

[Snake2715]

Parts all ordered from RockymountainATV.com last Sunday 8/25, most shipped and were here on Wednesday and today...

Parts on backorder are until October!:


Exhaust valve
Cylinder Head Gasket
Head Gasket Orings
Cylinder Gasket


I called Bike Bandit as well and they are on backorde there.. I know ronayers doesnt stock OEM..



So looks like I am on standstill unless someone else knows of an online supplier that stocks OEM?

[Paulcet]

Nobody "stocks" OEM except for high turn-over parts.  Oh, unless you count Adidasguy.  He might have gaskets.  And maybe a used valve.

[supersilas]

i've shopped at www.partspitstop.com for a couple of oem parts for my 01.  here is even a 5% off code  LDSAVINGS

being that your from central mi they have a store front in plainfield(village motorsports)  that you could pick it up from them.

[sledge]

People give up too easily    Try typing the part # into google   

http://www.motosport.com/motorcycle/oem-parts/SUZUKI/1995/GS500E/CAM-SHAFT-_-VALVE/VALVE,EXHAUST/12912-01D00

Or.....if you are desperate enough try overseas 

http://www.cmsnl.com/suzuki-motorcycle_model13053/?gclid=CN2Z8ZnHp7kCFQTMtAodNWEABg

http://www.robinsonsfoundry.co.uk/content/pages/shop/parts.htm

http://www.wemoto.com/bikes/Suzuki/

http://www.bike-parts-suz.com/suzuki-recherche-bike-pieces_nn.php?compteur=918&PartsListID=487408

[The Buddha]

I may have got too late to this point ...
But get valves from kibblewhite if yo ucan ... they are generally made of better material than the stock suzi junk ...
Of course, suzu is a lot better than kawi. With a kawi, you had to have it ...

Cool.
Buddha.

[Snake2715]

looks like rockymountain is coming through. first it said backordered until 9/3 then I got an email that it was backordered until 10/4 by their customer.service team.

looks like the remainder of my order was shipped out yesterday.