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June 26th, 2017, 07:22 AM   #11
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Thanks a lot

The good news is that my holiday start this Sunday and I might get the head done by then

2 bad news
1) there is somenthing draining the battery that needs to be sort out ( probably the ktm speedo)
2) the head had the surface milled to increse comp don't know exactly how much
I never done it before on 4T...any idea if it will compromise too much the timing? Or maybe getting a thicker head gasket? Do you guys have any 2cent about it thanks

Last edited by paolo6; June 26th, 2017 at 07:25 AM. Reason: Vvv
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July 18th, 2017, 08:10 AM   #12
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the head is still not ready it will take another week unfortunately.
It will fit but I won't be in able to run HP piston (actually what i wanted ) (clearance and everything will be check)

bad news is that omero moto is closing and he doesn't have any husaberg parts in the warehouse only kawa, ktm.... but luckily I will be able to get hold of one of his new tank

we had problem fitting straight the exhaust
and the shock needs some hard work more then expected as the shaft is rusted... plan 1) is to use the normal shock parts to fix it
the shock guy will come over tomorrow to see it and decide what's best doing

and to maybe make the life of my head and gasket a bit easier some ARP bolts from bush ''700 kit thread '' ...not that I need them but while I am there why not

slowly is all getting there Paolo6 a new start-20170715_152025.jpgPaolo6 a new start-20170718_143009.jpgPaolo6 a new start-20170718_143018.jpg
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Last edited by paolo6; July 18th, 2017 at 09:36 AM. Reason: xxs
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July 18th, 2017, 09:43 AM   #13
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The Elko-piston is the only one I have managed to crack. But then again, I can destroy almost everything!
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July 18th, 2017, 09:56 AM   #14
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Ahaha ...I know what you doing ...exactly, now that I am running on HC (from the milled head) I would be starting getting worried about having a light but too weak piston

My next big step will be timing. Shouldn't be an issue but if it is the plan B will kick in... would be milling 2 exact hole on the cam wheel at new 0 ( I want to avoid it) ...
It's all plan in my head just a pain in the b___

If I am not wrong you bought some custom head gasket MLS from a check company ...how did you find them ? Hope you get well soon maybe not is good to hear your experience
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Last edited by paolo6; July 18th, 2017 at 10:47 AM. Reason: fefe
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July 18th, 2017, 12:01 PM   #15
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Originally Posted by paolo6 View Post
Ahaha ...I know what you doing ...exactly, now that I am running on HC (from the milled head) I would be starting getting worried about having a light but too weak piston

My next big step will be timing. Shouldn't be an issue but if it is the plan B will kick in... would be milling 2 exact hole on the cam wheel at new 0 ( I want to avoid it) ...
It's all plan in my head just a pain in the b___

If I am not wrong you bought some custom head gasket MLS from a check company ...how did you find them ? Hope you get well soon maybe not is good to hear your experience
Well, I must not forget to give some credit to the Elko piston (it might also be sensitive to that..) for holding together even though the roof was in two pieces!

The MLS-gaskets from Merako was a big disappointment. If an MLS-gasket should be able to do the job, I have learned it needs some design features:
1. A thin viton layer or a "screen printed" layer, on upper/lower side
2. One outer layer needs to be embossed to help sealing the water jacket properly, because the fire ring is 0,10mm thicker than the rest of the gasket.
When turning to a professional company, that claims to be able to make custom gaskets, you kinda rely on that you will get a gasket that actually works! Naive of me... The embossing requires a specific press tool, which they only make for larger series of gaskets. That seems reasonable, but then they shouldn't take custom orders! Oh, the trouble I went through to find why they were not working! I'm sure their stock gaskets are just fine.
Currently I'm (re)using a solid copper gasket, 0,5mm thick. After some time it will leak drops of coolant into the combustion chamber in the weeks between rides, which is not a big deal if you are running an OEM liner. I'm using a steel liner which, corrodes at the speed of light when in contact with water... No. glycol is not allowed in racing engines, or it would contain a corrosion inhibitor. Im using cutting fluid, which apparently doesn't do the job with preventing corrosion as good...
I had a couple of gaskets custom made from Cometic. They look a bit like the ones Bushie made for himself when reusing the fibre part and replacing the fire ring with a copper dito. From what I heard, he was happy with those gaskets. I haven't tried mine out yet.
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Last edited by Dr_C; July 18th, 2017 at 12:10 PM.
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July 18th, 2017, 01:41 PM   #16
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that's what I was reading around even company ''gasket to go'' Ben Ballard (JBS guy) was using them and didn't work.
It could work with bush solution, but it will be in my plan B/C if anything goes mess like always does

glycol ... you know ...you can always lock the radiator cap so they can't check it, ( that's my 50 cent solution ) even by using the wire that you use to lock the oil bolts

you really been messing around ...
the picture on youtube that you click to get the video there were 4 guys around your bike(one with coffee, one on PC...) and I thought ''there you go that's his team'' but then I look closer and it was you in all of them


I am just waiting for the head now to been able to proceed and also the omero tank because the standard tank (picture (2) the cap is too close to the exhaust ..another problem

have you been on the track since the last update on the DOHC thread? how's the bike going?
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Last edited by paolo6; July 18th, 2017 at 01:42 PM. Reason: hg
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July 19th, 2017, 11:09 AM   #17
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Originally Posted by paolo6 View Post
you really been messing around ...
the picture on youtube that you click to get the video there were 4 guys around your bike(one with coffee, one on PC...) and I thought ''there you go that's his team'' but then I look closer and it was you in all of them


have you been on the track since the last update on the DOHC thread? how's the bike going?
I had a Czech friend visiting some years ago. He suggested and took the picture. Most important of all is to have fun, isn't it? I depend on a lot of people supporting me from time to time. Most of all my wife! But most of the time its a one man band.

I have tried it out some practice sessions at a local track. It handles as the Honda RS250 chassis I copied, and the engine pulls ferociously! I pull even with new supersport 600 bikes down the straight. That is entertaining the old fart on the seat! Unfortunately it vibrates so much the shock absorber breaks after 0,5-1,5 hours! I, sorry, my team will have to introduce a normal CB to this engine.
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July 19th, 2017, 11:45 AM   #18
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Unfortunately it vibrates so much the shock absorber breaks after 0,5-1,5 hours! I, sorry, my team will have to introduce a normal CB to this engine. [/QUOTE]

Sorry to hear your still having trouble with vibration Doc, have you tried the British company annsummers.com? Might be able to help.
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July 19th, 2017, 11:50 AM   #19
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Lol!!!!
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July 19th, 2017, 01:40 PM   #20
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where does it actually break? at the end of the day that's your last big problem, might be worth even like calo saying contact other company for advice

but as vibration is your problem is there a way for engineer something else? a support or something that can take it or take vibration out?

maybe this guy who work on this Maarten Janssens is Building the MJ Works Racing Supermono
https://www.facebook.com/maarten.jan...otos?pnref=lhc
might have some other idea

my only experience on a broken shock from ''vibration''(actually jumping) was from this pit bike I still got in Italy...the top of the shock snapped (chinese) and one of my friend had it CNC a custom one (can't remember the material ) but does the work (still nothing compare to yours ) Paolo6 a new start-img-20170719-wa0006.jpg

i just saw this page worth a look Brinn Inc.: Custom Shock Absorber Design & Manufacturing - gas bags, gas cells, foam cells, custom shock absorbers and dampers, aluminum and steel shock absorbers, shock absorber design service
I am sure you will get there at some point. like on your iridium plug
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