ER650 cases

[neil_cb125t]

Hey - so my replacement cases arrived, the lovely gentleman decided to pull them apart with a screw driver literally.....281889 there are marks like this everywhere incl where the main bearings sit....yay

If anyone has a spare set let me know, and if you know an American that sells crap on ebay slap him for me.

[steveyb]

Devcon will fix that, no worries.

[crazy man]

tig them up and file flat with a new mill file

[neil_cb125t]

Really I thought these were junk, ok who is DEVCON, if they can be welded and re machined then I have a few contacts

[malcy25]

ok who is DEVCON, a broke road racers friend!! Google it, it's a liquid metal putty thingymajig.

[steveyb]

devcon.co.nz
Blackwoods Protector are a distributor.

[Kevin G]

devcon.co.nz
Blackwoods Protector are a distributor.

I have a better solution... much quicker and cleaner than devcon...its called rapid fix
http://www.rapid-fix.com/HOME.html
Got me out of the shit this season after a stupid mistake...
Thanks to Budda for putting me onto it.

[jellywrestler]

Really I thought these were junk, ok who is DEVCON,
long shot
http://www.youtube.com/watch?v=IIEVqFB4WUo

[swarfie]

Really I thought these were junk, ok who is DEVCON, if they can be welded and re machined then I have a few contacts

Selleys "Kneed-it" will do the same as Devcon and both have the added advantage of no heat which will cause distortion which will happen to some degree with welding.

[Mental Trousers]

I think the issue here is some fuckwit thinks it's ok to pry cases apart with a screw driver. It's highly likely that said fuckwit will breed overspring. This is an unacceptable state of affairs.

[NAR RG500]

I think the issue here is some fuckwit thinks it's ok to pry cases apart with a screw driver. It's highly likely that said fuckwit will breed overspring. This is an unacceptable state of affairs.

If some rough bastard didn't down shift when the engine was already spinning above the red line then there never would have been a need for new cases.

[steveyb]

That's how they both ended up together.
Birds of a feather and all that......:bleh::laugh::eek:

Rapid Fix looks pretty good.
Possibly better for repairing cracked/broken bits than just filling in a small hole?
What say you?
Where get from?

[Mental Trousers]

If some rough bastard didn't down shift when the engine was already spinning above the red line then there never would have been a need for new cases.

Rough bastard buys from rough bastard. As steveyb said, birds of a feather eh.

[AllanB]

This two pack stuff is very impressive if you are willing to use those cases. I've used it to repair stuffed threads on old stuff that some other bugger butchered and works well.

http://www.jbweld.com/product/j-b-weld/


Usually available on Tm and I have seen in K-mart

[steveyb]

Devcon with different printing on tube. Even the same tubes.

Devcon is available in different formulations for when you want to get real picky about what you are doing.

I have used JB-Weld before too. As said it is the same thing, so works exactly the same. So good to go if that is what you can get.

[Grumph]

While Devcon will do the job adequately, I'd check that the cases aren't distorted before you start. If the ham fisted yank has used that much force, there may have been a case screw or two still in - which could have distorted the cases.
Post Devcon, I'd recommend a very light rub on a flat abrasive surface. I use a piece of thick MDF with wet and dry glued to it.

[Yow Ling]

Seems like alot of work for one race !

[jellywrestler]

I think the issue here is some fuckwit thinks it's ok to pry cases apart with a screw driver. It's highly likely that said fuckwit will breed overspring. This is an unacceptable state of affairs. Robert Taylor can help remove overspring

[HenryDorsetCase]

The thing with JB Weld is that the surfaces have to be clean and oil free or it doesnt work. Ive only used it twice, once successfully, once not, for that reason. Since they are apart, I'd be looking for the "weld it up, machine it flat" solution. I dont know who would do it but there must be people in your town or known in the racing community.

[codgyoleracer]

Dont trust any form of bog for a long term fix, listen to Scott.


Other alternative is to
1) Mill base back flat
2) Mill barrel until piston touches head
3) Mill piston

Repeat steps 1,2 & 3 until you need to remove a link from the cam chain to get any tension on it.

After doing the above, dont bother test running it, - just take it to the track and without warming it up thrash the snot out of it. What could possibly go wrong ?

[neil_cb125t]

Seems like alot of work for one race !

hahah this is to build a 85-90HP race motor for long term, these are replacement cases for a motor that threw a rod.... This is one out of 8 places that are damaged, the rest are the faces BETWEEN the cases, as in where the main bearings sit has had damage too.......

[neil_cb125t]

Dont trust any form of bog for a long term fix, listen to Scott.


Other alternative is to
1) Mill base back flat
2) Mill barrel until piston touches head
3) Mill piston

Repeat steps 1,2 & 3 until you need to remove a link from the cam chain to get any tension on it.

After doing the above, dont bother test running it, - just take it to the track and without warming it up thrash the snot out of it. What could possibly go wrong ?

Hey fella,

if only it was that easy - they damaged about 8 parts of the cases, the rest are on the faces where the cases bolt together, like where the main bearings sit.... think they are paperweights.

[Grumph]

The thing with JB Weld is that the surfaces have to be clean and oil free or it doesnt work. Ive only used it twice, once successfully, once not, for that reason. Since they are apart, I'd be looking for the "weld it up, machine it flat" solution. I dont know who would do it but there must be people in your town or known in the racing community.

Cold bogging is the only way guaranteed not to distort the cases. Machining back flat isn't an option as you alter bearing pinch dimensions. All you're trying to do is make them oil tight..the damage hasn't affected the case strength and they're dowelled anyway.
Degrease and bead blast the areas you're going to bog up, let it harden fully then as he said, flat mill file carefully...then final rub on wet & dry.

If it still leaks, put it in a sidecar....

[wayne]

maybe some quality rods ?

[neil_cb125t]

If some rough bastard didn't down shift when the engine was already spinning above the red line then there never would have been a need for new cases.

sorry, we were a second under the lap record so you could say I was trying..... stupid std rods....!!!

[neil_cb125t]

maybe some quality rods ?

yep big strong ones are on the way:headbang:

[neil_cb125t]

Cold bogging is the only way guaranteed not to distort the cases. Machining back flat isn't an option as you alter bearing pinch dimensions. All you're trying to do is make them oil tight..the damage hasn't affected the case strength and they're dowelled anyway.
Degrease and bead blast the areas you're going to bog up, let it harden fully then as he said, flat mill file carefully...then final rub on wet & dry.

If it still leaks, put it in a sidecar....

hahahaha yeah, looking more like buying another F&*ken set is the way to go, funny i have paid for 3 sets of these in the last 2 years, one never arrived, one blew up and these ones are paper weights....DAMMIOT!

[NAR RG500]

sorry, we were a second under the lap record so you could say I was trying..... stupid std rods....!!!

Doesn't matter what rods you use if you down shift when the engines already over revving from the last shift mate! I would agree with Grumph on that one and repair the cases though. Another product you could use is Bellzona. If anyone at the base has anything to do with a gunsmith then they will have it. Super expensive and super good.

[Mental Trousers]

A slipper clutch is the friend of rough bastards everywhere.

[Madness]

Rapid Fix looks pretty good.
What say you?
Where get from?

Trade Tools have it. 23 Sydney Street Petone.

[Grumph]

hahahaha yeah, looking more like buying another F&*ken set is the way to go, funny i have paid for 3 sets of these in the last 2 years, one never arrived, one blew up and these ones are paper weights....DAMMIOT!

When I built one some time back, I cleaned up and shot peened the rods. It dropped an exhaust valve insert cooling after a dyno session judging from the wreckage.....
When we ran the 500's I did the same with the rods for my motor and Tony's - never broke one and Tony's made well over 80 at the wheel on Nitro. Both pulled over 13 grand.
Preparation is the key.

[neil_cb125t]

When I built one some time back, I cleaned up and shot peened the rods. It dropped an exhaust valve insert cooling after a dyno session judging from the wreckage.....
When we ran the 500's I did the same with the rods for my motor and Tony's - never broke one and Tony's made well over 80 at the wheel on Nitro. Both pulled over 13 grand.
Preparation is the key.

Yeah that is what we had done to this motor - shot peen and lightened. I would say it was the over rev on the down shift that really hurt it. We also were running the piston to head clearance as tight as it could be....so a bit of stretch may have happened, cause mr piston to smack mr head. We can run lighter gudgeons we were running JE ones which were very heavy. Lastly, a slipper clutch is coming as im rubbish at down shifting.

[neil_cb125t]

Doesn't matter what rods you use if you down shift when the engines already over revving from the last shift mate! I would agree with Grumph on that one and repair the cases though. Another product you could use is Bellzona. If anyone at the base has anything to do with a gunsmith then they will have it. Super expensive and super good.

hahaha yeah it was totally me thrashing her fella! A yoyodyne slipper is in the packet keeping the carillos company as they fly over from USA. For the price of a set of cases we will just get a MINT set, possibly keep these damaged ones as spares and do a epoxy fix.

[Mental Trousers]

Lastly, a slipper clutch is coming as im rubbish at down shifting.

Slipper clutch and a quick shifter are worth double what you pay for them. They save engines.

[quickbuck]

Really I thought these were junk, ok who is DEVCON, if they can be welded and re machined then I have a few contacts

I might have some in my shed ;)

[quallman1234]

Whatever you do, get it milled back so you know its flat. Check distortion while your there.

[tail_end_charlie]

................................... and if you know an American that sells crap on ebay slap him for me.

That could turn into a full time job for someone.....................

[gammaguy]

I think the issue here is some fuckwit thinks it's ok to pry cases apart with a screw driver. It's highly likely that said fuckwit will breed overspring. This is an unacceptable state of affairs.

Actually not a fuckwit

He was smart enough to know he had fucked the cases and so on sold them on ebay

As you do.........

[budda]

While Devcon will do the job adequately, I'd check that the cases aren't distorted before you start. If the ham fisted yank has used that much force, there may have been a case screw or two still in - which could have distorted the cases.
Post Devcon, I'd recommend a very light rub on a flat abrasive surface. I use a piece of thick MDF with wet and dry glued to it.

I've personally used Devcon alloy PUTTY and JB Weld for exactly this situation ( only able to blame someone else the once though ! ) and both worked very well.

As Grumph says, take the time to check the cases - I use a thick float glass plate with fine wet n dry taped onto it, kero as lubricant

[HenryDorsetCase]

A slipper clutch is the friend of rough bastards everywhere.

http://www.sigmaperformance.com/slipperclutchrange.html


Mr Race Supplies in Dunedin does Sigma IIRC.

[Mental Trousers]

http://www.sigmaperformance.com/slipperclutchrange.html


Mr Race Supplies in Dunedin does Sigma IIRC.

I like the Sigma stuff. I put one of their Evo slipper clutches in my bike. Most of theirs you can use the standard plates and fibres but the lightweight race ones require different. From the part numbers my CBR600 has VFR800 bits in the clutch. Much better than the standard clutch for racing though.

[kiwi cowboy]

That could turn into a full time job for someone.....................

whoever gets the job set them on the job of cleaning out the lying cheating scumbags on trade me as the 90 day trial period.:ar15::ar15:

[neil_cb125t]

Cheers for all the help - replacement mint cases are on order now.

[steveyb]

Mortgage schmortgage, the bank won't mind if you miss payments for a month or 6!!!!

[Bert]

Cheers for all the help - replacement mint cases are on order now.

Radiator is comming too!!

[neil_cb125t]

Mortgage schmortgage, the bank won't mind if you miss payments for a month or 6!!!!

Haaha yeah the credit cards limit got doubled, then maxed... stupid racing. Its the carrilos and slipper that's costing the money!!! used ER sh*t is cheap

[neil_cb125t]

Radiator is comming too!!

AWESOME I was starting to get a bit worried - we might change the inlet/outlets, shes going on a big diet and all that extra piping may need to be junked! let me know when its due fella... new custom made titanium exhaust is being made as we speak.....MEADS SPEED ROCK - see em for all your HP needs:headbang:

[roadracingoldfart]

Nelly , i cant be fucked readin the entire thread. Those cases dont look too bad. Go see Chris , he can fix it , Devcon is wonderful (as long as you get Devcon A for alloy) but welding is better, just go see the boy and let him judge it. Ring if you want.