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Cracked engine cases
- greenman43
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My own stupid fault quite obviously, but now I need to try and remedy it. I was originally looking to weld them up, but I’m now thinking that JB Weld should do the trick as I don’t believe it’s in an overly stressed area, and we are talking one of the 6mm bolts. However, the stress has distorted the area slightly, such that it’ll need to be pushed back into shape before trying to fix it.
Thinking that if I bolt the cases back together and then heat the area with a heat gun, the material should ‘soften’ enough to return to it’s original shape. Then I apply the JB Weld, let it set, and see how the cases look when I unbolt them. Wondering what the consensus is on this, am I naive in thinking the heat gun will heat the area enough for this to work and that JB Weld will hold, and do I just need to bite the bullet and get it welded ? Alternatively, it is going to be simpler to just buy another set of cases ?
For background, this will be a mostly-stock engine rebuild, and as its going into a Mk II chassis, originality re Z1R engine number is irrelevant to me. At the moment, I’m thoroughly discouraged with this build, and on the verge of putting the MK II aside to start on a GPz900R project waiting in the wings. I’m hoping for a cost-effective solution, to restore some enthusiasm !
Thanks in advance,
Brian
1980 Z1000 A4 Mk II
2007 ZX10R 'SL' (superlight)
1989 GPz900R
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- Puffin
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KZ1000 J Long Term Owner
KZ1100
KZ1100 Spectre project
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- Z1Driver
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- love the smell of triple smoke
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- ed spangler
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- Tennessee Z
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Have 1975 Kawasaki Z1-B & 2003 Harley Davidson Heritage Softail Classic
Had Hondas, Harleys and many ,many Z Series Kaws both Std. & LTD's
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- sbc1320
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1980 KZ1000 LTD-B4(MK II engine) - Progressive suspension, MTC pistons, Dynojet Stage III, all wear items replaced, WFO paint scheme(1978), etc..
Past bikes- 2 1976 Kz900's, 5 1975-76 Honda CB750's, Honda 500 -4, Honda 250, Honda 125, Honda 100, Suzuki RM 250, Honda XL350, Kawasaki KLR 650, etc..
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- Street Fighter LTD
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- TURBO, Its Better to be Blown than Injected
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HTH
Dave
Original owner 78 1000 LTD
Mr Turbo Race Kit, MTC 1075 Turbo pistons by PitStop Performance , Falicon Ultra Lite Super Crank, APE everything. Les Holt @ PDM's Billet Goodies . Frame by Chuck Kurzawa @ Logghe Chassis . Deep sump 5qt oil pan. RIP Bill Hahn
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- turboking
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2005 Kawasaki mean streak
2000 325 H.P. mcXpress turbo Hayabusa
1979 kz 1000 mk II ATP turbo
1975 Z1 960 cc Mr. Turbo
1975 Z1 1428 big block ATP turbo
1976 Kz900 1103 cc ATP turbo
1985 GS 1150E
1983 GS 1100E
1997 Suzuki Bandit 1200S
2001 Kawasaki EX 500 Ninja
1972 Honda cb750 (836cc turbo)
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- baldy110
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- Cynjut
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It will look like it's working, then will fail, dumping your engine oil, probably at speed. If you get lucky and none of the oil pouring out of your engine gets on your tires, you'll seize a cam bearing, score a rod bearing, score your piston sleeves. burn out your rings, and probably cook the crank. After that, you'll still have to TIG weld it to fix it, but now you have to replace other engine components as well. The cheapest solution is to just fo it right the first time.
1977 KZ-1000 A1
1982 KZ-1000 M2 Frankenbike
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- 531blackbanshee
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you will never forget that bolt again :whistle: .
i tigged it up and filed it back flat and it hasn't been an issue.
leon
skiatook,oklahoma 1980 z1r,1978 kz 1000 z1r x 3,
1976 kz 900 x 3
i make what i can,and save the rest!
billybiltit.blogspot.com/
www.kzrider.com/forum/5-chassis/325862-triple-tree-custom-work
kzrider.com/forum/5-chassis/294594-frame-bracing?limitstart=0
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- z1wiz
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Over 30 years with z1's, Currently down to only one 75, a j model dragbike, and 2 KZ1000 dragbikes.
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- 650ed
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Cynjut wrote: .....you'll still have to TIG weld it to fix it........ The cheapest solution is to just do it right the first time.
+1 Absolutely true! Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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