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1977 KZ1000 Restomod
- calum
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zed1015 wrote: Regardless of cam symmetry the lobe center timing method will get them degreed correctly every time.
You can use whatever checking height you like ( even negative figures) as long as you use the same ones in all your calcs .
You only need to locate true TDC on cyl 4 ( right hand , ign side, end cylinder) for cam degreeing .
This will cam time all cylinders unless the crank is twisted .
Thanks, this reinforces what I was thinking. So should I check the angle at 1mm lift (using negative lash) or just check it at max lift? If max lift, are my assumptions correct (IN: 105°ATDC - EX: 107.5°BTDC)?
Regarding the cylinders: I think I'll end up getting some JE pistons and getting the cylinders bored by a local guy. He does good work and if I have any problems I can just go round and talk to him. If I get the Pit Stop kit I'm stuck with it (assuming it really is from Pit Stop - the guy has the invoice but there's no way to be sure that the parts are actually the ones from the invoice).
KZ1000 Restomod ( www.kzrider.com/forum/11-projects/614517-1977-kz1000-restomod )
1977 KZ1000A1 ( www.kzrider.com/forum/11-projects/616901...-spare-parts-project )
1980 KZ750H ( kzrider.com/forum/11-projects/612054-kz750h-restoration )
2000 BMW F650GS
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- calum
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New plan for a nice street engine:
- 1075 Wössner pistons (or JE if he can't get Wössner)
- Stock valve sizes with seats bored out 1mm and bowls ported
- Yoshimura stage 1 cams
- RS34's
- No welding the crank, just check everything
The last point may cause a bit of a stir, but it just isn't worth the money (a lot more over here than it seems to be in the US). For the cost of doing it right I can almost replace the entire top end - no way I'm getting someone to weld the crank and not having it properly checked and balanced afterward.
The chances of a crank in good condition spinning with this setup is ridiculously low, especially looking at the pressure required to seperate them. I'll take my chances
What I found interesting is that almost nobody that I talked to in Germany recommended welding the crank, whereas pretty much everyone in the states did. Maybe you guys just don't trust japanese engineering
Have next week off to sort out the mini and get the Zephyr engine back in the frame. Will hopefully have some time to start planning what to cut off the frame....
KZ1000 Restomod ( www.kzrider.com/forum/11-projects/614517-1977-kz1000-restomod )
1977 KZ1000A1 ( www.kzrider.com/forum/11-projects/616901...-spare-parts-project )
1980 KZ750H ( kzrider.com/forum/11-projects/612054-kz750h-restoration )
2000 BMW F650GS
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- zed1015
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Even a stock motor can twist it's crank through a high speed missed gear or hooking up hard after a burnout.
The torque required to twist is much less than the poundage required to press the webs apart.
If you have ever seen a crank trued after being pressed up and clocked it is simply done by a highly skilled mallet technician.
Sounds crude but effective and a few sharp taps is all it takes.
AIR CORRECTOR JETS FOR VM CARBS AND ETHANOL RESISTANT VITON CHOKE PLUNGER SEAL REPLACMENT FOR ALL CLASSIC AND MODERN MOTORCYCLE CARBURETTORS
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- calum
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Thanks zed. I realise there is a lot more leverage when twisting than when pressing apart. Still, consensus here seems to be that it isn't necessary under 130-140bhp - I figure I'll be hitting about 105-115 tops.
Also, although I can see myself missing a gear I'm not one for burnouts anymore - would rather spend my money on parts than rubber
KZ1000 Restomod ( www.kzrider.com/forum/11-projects/614517-1977-kz1000-restomod )
1977 KZ1000A1 ( www.kzrider.com/forum/11-projects/616901...-spare-parts-project )
1980 KZ750H ( kzrider.com/forum/11-projects/612054-kz750h-restoration )
2000 BMW F650GS
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- calum
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The worst crack in the head:
The cylinders - I went with Wössner pistons, had to go with German quality
KZ1000 Restomod ( www.kzrider.com/forum/11-projects/614517-1977-kz1000-restomod )
1977 KZ1000A1 ( www.kzrider.com/forum/11-projects/616901...-spare-parts-project )
1980 KZ750H ( kzrider.com/forum/11-projects/612054-kz750h-restoration )
2000 BMW F650GS
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- Dragbike_Mike
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And, just a suggestion if you haven't done so already - before installing those pistons, I would gently radius the edges of the valve relief pockets that are cut into the domes. This eliminates a potential "hotspot" and will lessen the chance of preignition. A small detail....
Good luck with your build.
Mike
Presently - 1980 KZ1000B4 LTD w/mild ported head, Megacycle cams, 1015cc Wiseco, Falicon Supercrank, R&D undercut trans
In a former life - KZ-based dragbike - CrMo car tire chassis, 1395cc, Hahn Racecraft turbo system, VP C16, Orient Express 3-spd auto, 7.80's @ 165-170.
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- Mikaw
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Dragbike_Mike wrote: And, just a suggestion if you haven't done so already - before installing those pistons, I would gently radius the edges of the valve relief pockets that are cut into the domes. This eliminates a potential "hotspot" and will lessen the chance of preignition. A small detail....
Good luck with your build.
Mike
I’m not a professional builder but I agree. When I was building SBC street engines I’d grind and radius any sharp edges off.
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.
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- calum
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Mike: As far as I can tell the skirts have a teflon coating. Can't find any real info on it though and no paperwork in the box. I'll gently take the edges off before I install them.
KZ1000 Restomod ( www.kzrider.com/forum/11-projects/614517-1977-kz1000-restomod )
1977 KZ1000A1 ( www.kzrider.com/forum/11-projects/616901...-spare-parts-project )
1980 KZ750H ( kzrider.com/forum/11-projects/612054-kz750h-restoration )
2000 BMW F650GS
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- increasing
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increasing
1976 Kawasaki KZ900-A4, 1974 Kawasaki Z1A 900, 1987 Kawasaki GPX750R
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- calum
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KZ1000 Restomod ( www.kzrider.com/forum/11-projects/614517-1977-kz1000-restomod )
1977 KZ1000A1 ( www.kzrider.com/forum/11-projects/616901...-spare-parts-project )
1980 KZ750H ( kzrider.com/forum/11-projects/612054-kz750h-restoration )
2000 BMW F650GS
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- Skidmark
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Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
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- calum
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Before:
After:
KZ1000 Restomod ( www.kzrider.com/forum/11-projects/614517-1977-kz1000-restomod )
1977 KZ1000A1 ( www.kzrider.com/forum/11-projects/616901...-spare-parts-project )
1980 KZ750H ( kzrider.com/forum/11-projects/612054-kz750h-restoration )
2000 BMW F650GS
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