My GK76a winter service/tidy-up project.

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Hubbskiboy
Settled in member
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Posts: 73
Joined: Tue Feb 02, 2016 8:57 pm
Bike owned: GK76A 1994 and 1990
Location: Stourbridge, West Midlands
Re: My GK76a winter service/tidy-up project.

Post by Hubbskiboy » Thu Aug 30, 2018 8:56 am

Yep.
After all the work of stripping the engine down, you'd be very daft not to fit OEM rings.
They're a ridiculous price for a few metal rings, but time is more important to me.
I just vapour blasted the pistons as they showed hardly any wear.
New exhaust valves and valve seals.
Cleaned the intake valves as again they showed little wear.
Timing chain was well within tolerances.
Odometer was showing 62,634 kilometres when I bought it!!!! :o

moforockband
Familiar Member
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Joined: Wed Jun 03, 2015 9:41 am
Bike owned: GK73a SP CRM250 mk3
Re: My GK76a winter service/tidy-up project.

Post by moforockband » Thu Aug 30, 2018 9:17 am

Were your valve guides ok after 60k?? I'm assuming they were. The book says something about wiggling them about and checking for 2mm play :? Thinking about replacing mine on my old chain smoker :)
BTW I have a set of 73a 76a gen rings here on the shelf if anyone needs a set.

Hubbskiboy
Settled in member
Reactions:
Posts: 73
Joined: Tue Feb 02, 2016 8:57 pm
Bike owned: GK76A 1994 and 1990
Location: Stourbridge, West Midlands
Re: My GK76a winter service/tidy-up project.

Post by Hubbskiboy » Sat Sep 01, 2018 5:44 pm

I didn't specifically go out of my way to check for play in the valves, but I think I would've noticed if they were 2mm out.
I used some good qualty moly grease to lube them and I also re-seated them with a valve lapping tool.
They all seemed pretty solid to me and slid through the guides perfectly.
The more I think about it and based on the feedback I get from bike people and metal workers who have seen my engine parts, I suspect that this is not the original engine.
As I said, the pistons looked mint apart from carbon buildup.
The cams showed little if any wear and the timing chain had hardly any stretch.
Hopefully I've just lucked out and got a nice well looked after little ticker.
Did you say you've got a set of genuine Suzuki piston rings?
I'll need another set soon for the other bike.


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