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frame leveling for swingarm installation
- Mike26
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06 Mar 2012 20:14 #508171
by Mike26
frame leveling for swingarm installation was created by Mike26
Hi guys, 57 yr old, former 1973 Kawasaki 900 z1 owner. Building a streetfighter Z1(bull docks/sanctuary, sort of). Front forks are installed, almost. Trying to determine frame level/hieght in relation to swingarm shock mount height. I'm using a 2008 gsxr 750 swingarm and shock. I was surprised at how well it fit. I've seen any where from bottom frame tube perfectly level too quite a pronounced low front end. There again bull docks / seem to have the angle about right but I don't have any numbers to dial it in. Anybody out there that could help? Thanks!
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- M357.5
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- Kwakas N' lots of em'
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06 Mar 2012 20:17 #508173
by M357.5
83 KZ750L X2 + goodies = Project
84 KZ750L the mini ELR replica replica lol
84 ZX750E Turbo modded n' FAAAAASSSSSSTTTTT
85 GPz900r GREEN N' MEAN
Replied by M357.5 on topic frame leveling for swingarm installation
I used an angle gauge and raised the rear untill my steering head angle was 24.5*
Its a slight bit higher at the rear of the frame than the front of the frame.
Its a slight bit higher at the rear of the frame than the front of the frame.
83 KZ750L X2 + goodies = Project
84 KZ750L the mini ELR replica replica lol
84 ZX750E Turbo modded n' FAAAAASSSSSSTTTTT
85 GPz900r GREEN N' MEAN
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- mark1122
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06 Mar 2012 20:26 #508174
by mark1122
76 KZ, frame gusset work,1200CC.Ported by Larry Cavanaugh, 1.5mm.over intakes, Carron Pipe, ZRX12 rear end, and seat,96zx9 front end.
01 CBR600F4i Track bike.
Cobourg, Ont. Can.
~ ~ ~_@
~ ~ _- \,
~ (k) / (z)
Replied by mark1122 on topic frame leveling for swingarm installation
i would focus on copying the geometry on the rear end of the donor bike. that way the shock will work properly. Then u get, what u get for stance . now if u want to change the stance u can raise the front.
Remembering that u r loosing ride height with the 17” wheels, i feel that its good to start with a high rear end, and go from there.
Remembering that u r loosing ride height with the 17” wheels, i feel that its good to start with a high rear end, and go from there.
76 KZ, frame gusset work,1200CC.Ported by Larry Cavanaugh, 1.5mm.over intakes, Carron Pipe, ZRX12 rear end, and seat,96zx9 front end.
01 CBR600F4i Track bike.
Cobourg, Ont. Can.
~ ~ ~_@
~ ~ _- \,
~ (k) / (z)
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- M357.5
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06 Mar 2012 20:48 #508180
by M357.5
83 KZ750L X2 + goodies = Project
84 KZ750L the mini ELR replica replica lol
84 ZX750E Turbo modded n' FAAAAASSSSSSTTTTT
85 GPz900r GREEN N' MEAN
Replied by M357.5 on topic frame leveling for swingarm installation
Mark has a valid point.
I did a cantilever setup on the rear and built my own swingarm so I didnt need to worry about linkages and dogbone lengths etc.
A custom set of triple clamps with some drop in them will help cure the nose down attitude.
I did a cantilever setup on the rear and built my own swingarm so I didnt need to worry about linkages and dogbone lengths etc.
A custom set of triple clamps with some drop in them will help cure the nose down attitude.
83 KZ750L X2 + goodies = Project
84 KZ750L the mini ELR replica replica lol
84 ZX750E Turbo modded n' FAAAAASSSSSSTTTTT
85 GPz900r GREEN N' MEAN
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- Mike26
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08 Mar 2012 09:57 #508509
by Mike26
Replied by Mike26 on topic frame leveling for swingarm installation
Thanks for the info. Is there some significance to the 24.5 degree angle? Wondering if that's stock or something better?
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- mark1122
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08 Mar 2012 20:17 #508620
by mark1122
not really. but it does show u that less rake is acceptable on the old bikes. it was normal for racers to add rake, but that was so they could go around tracks at very high speeds. my rake is about 24* and i have no trouble at 125mph, track or road.
76 KZ, frame gusset work,1200CC.Ported by Larry Cavanaugh, 1.5mm.over intakes, Carron Pipe, ZRX12 rear end, and seat,96zx9 front end.
01 CBR600F4i Track bike.
Cobourg, Ont. Can.
~ ~ ~_@
~ ~ _- \,
~ (k) / (z)
Replied by mark1122 on topic frame leveling for swingarm installation
Mike26 wrote: Thanks for the info. Is there some significance to the 24.5 degree angle? Wondering if that's stock or something better?
not really. but it does show u that less rake is acceptable on the old bikes. it was normal for racers to add rake, but that was so they could go around tracks at very high speeds. my rake is about 24* and i have no trouble at 125mph, track or road.
76 KZ, frame gusset work,1200CC.Ported by Larry Cavanaugh, 1.5mm.over intakes, Carron Pipe, ZRX12 rear end, and seat,96zx9 front end.
01 CBR600F4i Track bike.
Cobourg, Ont. Can.
~ ~ ~_@
~ ~ _- \,
~ (k) / (z)
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