Engine 17.6k topics

Camshaft, cylinder head, valves, cylinder block, pistons, exhaust, crankshaft, clutch, transmission, engine lubrication system, etc.
48 Replies

ZX7/Z1 Oil Cooler

Category: Engine Topic started 18 Nov 2015 14:46, by SWest
40.5k Views
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Last Post by SWest 28 Feb 2016 16:49
0 Replies

Tech Forum Rules

Category: Engine Topic started 18 Jun 2007 20:45, by KZQ
30.7k Views
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Last Post by KZQ 18 Jun 2007 20:45
 
9 Replies

Porting the Z1 by Joe Hooper

Category: Engine Topic started 02 Feb 2026 14:45, by KZQ
1041 Views
Andre G.'s Avatar
Last Post by Andre G. Today 06:41
5 Replies

1979 KZ650 B3 valve clearances

Category: Engine Topic started Yesterday 19:38, by Vietvet
88 Views
Injected's Avatar
Last Post by Injected Today 06:01
39 Replies

stopping gasket leaks

Category: Engine Topic started 23 Jun 2026 09:30, by dewy0823
2439 Views
RonKZ650's Avatar
Last Post by RonKZ650 06 Nov 2026 20:35
6 Replies

Oil cooler for GPZ1100B1 1981/82

Category: Engine Topic started 05 Nov 2026 16:41, by Bozo
145 Views
Kelly E's Avatar
Last Post by Kelly E 06 Nov 2026 11:00
13 Replies

Can't Find My Box of Valve Shims. '81 GPz550

Category: Engine Topic started 30 Oct 2026 17:33, by chopper1963
389 Views
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Last Post by chopper1963 05 Nov 2026 10:10
7 Replies

Drive for now or rebuild the top end?

Category: Engine Topic started 01 Nov 2026 13:25, by LTDflyer1000
242 Views
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Last Post by LTDflyer1000 04 Nov 2026 17:27
3 Replies

Crack near sparkplug, does this happen to bathtub head?

Category: Engine Topic started 03 Nov 2026 05:41, by Andre G.
197 Views
zed1015's Avatar
Last Post by zed1015 04 Nov 2026 09:31
31 Replies

Head match

Category: Engine Topic started 13 Sep 2026 15:35, by lovethemkzs
1009 Views
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Last Post by TexasKZ 01 Nov 2026 19:36
7 Replies

Should this oil be used, or recycled?

Category: Engine Topic started 30 Oct 2026 19:03, by daveo
225 Views
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Last Post by TexasKZ 01 Nov 2026 11:41
8 Replies

Cam identification

Category: Engine Topic started 27 Mar 2023 10:16, by Mikaw
2192 Views
Andre G.'s Avatar
Last Post by Andre G. 01 Nov 2026 07:02
36 Replies

Seized engine kz440

Category: Engine Topic started 25 Apr 2026 12:30, by KZfreely
2470 Views
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Last Post by KZfreely 27 Oct 2026 18:59
5 Replies

GPZ550/615 frame off restoration clutch slipping after power up

Category: Engine Topic started 25 Oct 2026 12:32, by 577nitro
194 Views
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Last Post by Daftrusty 26 Oct 2026 13:04
1 Replies

1982 KZ1000LTD

Category: Engine Topic started 25 Oct 2026 07:32, by rickysnicker
154 Views
bound's Avatar
Last Post by bound 26 Oct 2026 08:13
2 Replies

Inner and outer valve springs clearance

Category: Engine Topic started 25 Oct 2026 05:21, by Sixten
160 Views
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Last Post by Sixten 25 Oct 2026 13:39
29 Replies

Runaway Idle

Category: Engine Topic started 20 Sep 2026 17:43, by Mlodge
1031 Views
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Last Post by 577nitro 21 Oct 2026 10:12
57 Replies

Whelp! I found the problem.

Category: Engine Topic started 05 Jan 2026 01:47, by Stereordinary
5412 Views
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Last Post by Stereordinary 18 Oct 2026 09:09
1 Replies

Should I oil the bores or not

Category: Engine Topic started 17 Oct 2026 15:00, by Vietvet
209 Views
zed1015's Avatar
Last Post by zed1015 17 Oct 2026 15:13
27 Replies

Z1 plunger replacement

Category: Engine Topic started 01 Sep 2026 17:37, by 73z1
1409 Views
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Last Post by Rolf1976_KZ900 17 Oct 2026 03:38
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