[DirtyR14]

I was trying to pull the crank but I was unable to find a screw that fit the inner brace. Any suggestions as to the size ?

 

[DirtyR14]

FYI!! The bolt is a M8 -1.25

 

[DirtyR14]

 

[DirtyR14]

Fixable ???

 

[Sixpack577]

I would run it as is.
That piece is still securely attached, and is not structural and has no stress on it.
It is in the case design for crank windage/it keeps oil from sloshing directly on the journals and foaming the oil.

As far as actually repairing it, yes, cast aluminum can be tig welded.
Will it be strong? The weld will be the strongest point on a casting repair, but again, no stress on that part, so your call.
That, or knock the chunk out and call it good.

 

[4stroker4life]

Agree. Snap it off and run it, i can post a pic of my 660 with the same spot broken off and it runs just fine

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[4stroker4life]

.

 

[DirtyR14]

Thanks for the advice. I am going to snap it, I am having a lot of issues pulling the the bearings. SMH

 

[QuadManiac]

Yeah, I'd break it off and file the edges smooth.

 

[DirtyR14]

My transmission gears fell off. Everything seems to be moving smoothly. I will need some help making sure my gears are set up correctly. I will be washing my case with oil eater to ensure I have no metal in the gears.
Anyone know where I can find new dowels locally?

 

[Sixpack577]

Hardware store or FastenAll

 

[DirtyR14]

I have snapped the broken section and will sand down using my dremel.
Has anyone used oil eater to was the inside of the case? I was told bc it has water it could rust up the gears. I can always just use diesel.

 

[Sixpack577]

I have snapped the broken section and will sand down using my dremel.
Has anyone used oil eater to was the inside of the case? I was told bc it has water it could rust up the gears. I can always just use diesel.

You can sand that by hand, knock any sharp edges off, aluminum is soft and easy to work with.
And, diesel fuel is fine, as is kerosene, brake cleaner, or most any degreaser.

 

[DirtyR14]

I appreciate all the help. I am a novice at this mechanic stuff. I will need to buy a new cylinder what is the difference in a 102mm big bore and the OEM. Will I need to add any upgrade parts for the top end if I purchase the 102?

 

[Sixpack577]

I would not buy a Niche cylinder.
I have seen 3 bad ones personally...of 4(not for a 660).
There are quite a few complaints with them here too.
Spend a little more and buy a better brand, or have yours replated or sleeved, it will be Much more dependable.
I don't remember 660 bore diameter off hand, but a 102mm piston is just a little larger diameter than stock, not a big deal, and all you need with it is a quality head gasket.
Go up to at least an 11.1 compression ratio, and you'll gain some low rpm power.
It'll run good on 93 octane.

 

[DirtyR14]

I noticed that LA sleeve sells a 100.mm sleeve , I can try to re sleeve my self . Team I am giving away the following. DM me if interested, if not I am just throwing them away.

 

[DirtyR14]

Final result.

 

[4stroker4life]

That should work fine. You still gotta clean it, right? Hey i know this is getting expensive already, but if you can afford it you really should put new bearings in it too

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[DirtyR14]

Yes, I am cleaning today with oil eater. It’s a water base degreaser and eco friendly. I will be replacing both main bearings .

 

[4stroker4life]

Yes, I am cleaning today with oil eater. It’s a water base degreaser and eco friendly. I will be replacing both main bearings .

I assumed you were, but i was referring to those transmission bearings that are still in the case in your picture. I dont know how much metal was inside your engine but there was quite alot in mine and considering it is a almost 20 year old machine i thought it was wise to replace all the bearings, even the counterbalancers, while i had it apart. It did cost me an extra $150 but i sure sleep good at night

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