Topic: My 550 do over thread. Getting a 650 upgrade

[CBGhia]

Ouch!

Yeah,  I'm a dumb ass.   

I still have my old rings.  I wonder if I have an oil ring that is good enough to stick in there for now and I will just bore my other cylinders and put in the Crusinimage pistons a little later.   thoughts?

[budman]

If it was me I wouldn't want those busted fins haunting me every time I got on the bike.

[SOHC4 Cafe Racer Fan]

I think that many broken fins will bug you (mostly) if you leave it as is.  You should be able to get a good condition cylinder cheaply on eBay. 

Assuming we are talking about a 650 motor, I wasn't aware that cruzinimage made a 650 kit.  I was only aware of the Dynoman 674 high compression kit, or those like Paulages that have used a larger bore kit requiring some delicate machining work to overlap the sleeves. 

[RAFster122s]

 You could send it to Jim to microweld the broken parts back on...would require some finesse to make it not obvious after beingwelded unless Jims welding isn't apparent. Some small diamond bits in a dremel would help and top sides of fins would need cosmetic work and repair would only be apparent from below or at profile if you got that low on the motor to see it.  Rings, well it depends on if it is oversized or stock rings...

[CBGhia]

I think that many broken fins will bug you (mostly) if you leave it as is.  You should be able to get a good condition cylinder cheaply on eBay. 

Assuming we are talking about a 650 motor, I wasn't aware that cruzinimage made a 650 kit.  I was only aware of the Dynoman 674 high compression kit, or those like Paulages that have used a larger bore kit requiring some delicate machining work to overlap the sleeves.

http://www.ebay.com/itm/79-82-HONDA-CB650-1-00mm-OVERSIZE-PISTONS-SET-4-PISTONS-INCLUDE-CI-CB650APS-2-/161856493778?hash=item25af6618d2:g:2E8AAOSwmrlUwKfJ&vxp=mtr 

[CBGhia]

I may have a solution in the works.  Gotta take everything to my buddies place later this week.  Stay tuned.

[SOHC4 Cafe Racer Fan]

I think that many broken fins will bug you (mostly) if you leave it as is.  You should be able to get a good condition cylinder cheaply on eBay. 

Assuming we are talking about a 650 motor, I wasn't aware that cruzinimage made a 650 kit.  I was only aware of the Dynoman 674 high compression kit, or those like Paulages that have used a larger bore kit requiring some delicate machining work to overlap the sleeves.

http://www.ebay.com/itm/79-82-HONDA-CB650-1-00mm-OVERSIZE-PISTONS-SET-4-PISTONS-INCLUDE-CI-CB650APS-2-/161856493778?hash=item25af6618d2:g:2E8AAOSwmrlUwKfJ&vxp=mtr

You learn something new everyday (if you're lucky).  That's great that they are making those for the 650.

My only thought is that they are about the same compression as a stock motor, and only a very small displacement increase to somewhere in the neighborhood of 636-640cc (stock is 626cc). 

This would make more sense to me if your stock bores are tired and you need to go up in size but don't necessarily want a performance motor -- just something to refresh a tired stock engine.  If so, and you are shopping a new cylinder, maybe just get a clean stock cylinder and keep it stock.  Otherwise, if you are going to over-bore, kick up the compression and go with a 674 kit.

Just a thought.

[bwaller]

Sweat the sleeves out of this one & install in another cylinder. (I imagine these were bored?) Then you just need to deck the new one.

[SOHC4 Cafe Racer Fan]

Sweat the sleeves out of this one & install in another cylinder. (I imagine these were bored?) Then you just need to deck the new one.

Duh!! Excellent advice, Brent! 

[RAFster122s]

Just make sure they are seated well and pressed in place or you might end up with a dropped liner and face another round of engine work. I have a set of overbored cylinders for a HA605 kit that happened to...
David

[bwaller]

David, I believe heat only is the right way to do this. Any time someone else has attempted changing one of my sleeves (for whatever reason) and uses a press, the sleeve settles after a few heat cycles. Use heat to remove, clean well, freeze the sleeves, heat the block and the sleeves drop nicely into place. Just be careful not to allow them to drop without some control & break the flange.

[RAFster122s]

Right Brent...
Just the former owner of this had an unfortunate experience in liners not being done properly...
he was done with trying it and reverted to stock bore with overbore for oversized pistons...
David

[CBGhia]

Sweat the sleeves out of this one & install in another cylinder. (I imagine these were bored?) Then you just need to deck the new one.

That is a good idea.  I got something else I am about to try, but I don't want to spoil it in case it turns out to be a bad idea.  LOL   

[CBGhia]

What do you guys think?







I just cleaned up the chips and made the other side match.  Gonna repaint it and get new gaskets and just bolt it all up.

[Stev-o]

Hope it runs better than it looks!  Holy #$%*e, you are putting that motor through the ringer. 

[RAFster122s]

It is streamlining, right?

Enhanced carb low pressure beneath them due to the mod?

[CBGhia]

It is streamlining, right?

Enhanced carb low pressure beneath them due to the mod?

Saving weight where I can.   

[bwaller]

Well that's one way to do it. Thinking on your feet!

[CBGhia]

Hope it runs better than it looks!  Holy #$%*e, you are putting that motor through the ringer.

You'll know soon enough, when I am chasing you all around the hills.  This does, however, cause me a bit of a delay.
I won't be making it down to MotoGP, as I have a different event to attend that I can't really get out of. 

[CBGhia]

This would make more sense to me if your stock bores are tired and you need to go up in size but don't necessarily want a performance motor -- just something to refresh a tired stock engine.  If so, and you are shopping a new cylinder, maybe just get a clean stock cylinder and keep it stock.  Otherwise, if you are going to over-bore, kick up the compression and go with a 674 kit.

Just a thought.

I like the thought of the 674 kit, but $519.00! Damn he wants all the money for those pistons! I get that it's top quality and all of that.   I understand that it is probably well worth it, but the first time I built this bike, I only had $1200 bucks in the whole thing and it was running, driving, and taking me on 1500 mile road trips.

I have kids and they suck up all my spare cash.  Like my daughter hit a curb the other day and blew a tire. I bought the car last year, so I didn't have any kind of tire warranty. $185 later....

[SOHC4 Cafe Racer Fan]

This would make more sense to me if your stock bores are tired and you need to go up in size but don't necessarily want a performance motor -- just something to refresh a tired stock engine.  If so, and you are shopping a new cylinder, maybe just get a clean stock cylinder and keep it stock.  Otherwise, if you are going to over-bore, kick up the compression and go with a 674 kit.

Just a thought.

I like the thought of the 674 kit, but $519.00! Damn he wants all the money for those pistons! I get that it's top quality and all of that.   I understand that it is probably well worth it, but the first time I built this bike, I only had $1200 bucks in the whole thing and it was running, driving, and taking me on 1500 mile road trips.

I have kids and they suck up all my spare cash.  Like my daughter hit a curb the other day and blew a tire. I bought the car last year, so I didn't have any kind of tire warranty. $185 later....

Gotcha.  You will still get a nice bump up from the stock 650, and a larger improvement from the 550.

[Stev-o]

Hope it runs better than it looks!  Holy #$%*e, you are putting that motor through the ringer.

You'll know soon enough, when I am chasing you all around the hills.

Or....I may be chasing you if on my 550F! [Then I'll be shopping for a 650 motor!] 
Or I'll jump on the 836...

[SOHC4 Cafe Racer Fan]

“Faster, Faster, until the thrill of speed overcomes the fear of death.”  - Hunter S. Thompson

[CBGhia]

“Faster, Faster, until the thrill of speed overcomes the fear of death.”  - Hunter S. Thompson

Song of the Sausage People is one of his greatest works.  I love me some HST! 

You just added to my signature line 

[CBGhia]

No new picture today, but the engine is together!  One big step!
Steve sent me some cb750 carbs, so those will also be on the bike soon!