Engine 17.5k topics

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

Valve adjustment Z1/KZ 1000

Category: Engine Topic started 16 May 2017 20:50, by SWest
41.2k Views
Last Post by xstreamcanadian 14 May 2024 13:04
49 Replies

ZX7/Z1 Oil Cooler

Category: Engine Topic started 18 Nov 2015 14:46, by SWest
35.1k Views
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
29.7k Views
Last Post by KZQ 18 Jun 2007 20:45
 
40 Replies

Terrible motor swap idea kz440

Category: Engine Topic started 22 Dec 2025 07:42, by bound
775 Views
Last Post by Nerdy Yesterday 13:39
19 Replies

Whelp! I found the problem.

Category: Engine Topic started 05 Jan 2026 01:47, by Stereordinary
270 Views
Last Post by Injected Yesterday 08:18
5 Replies

Ignition Timing on 1000J

Category: Engine Topic started 07 Jan 2026 09:08, by MJinCO
85 Views
Last Post by Wookie58 Yesterday 07:52
14 Replies

Cam End Plugs + Stripped Valve Cover Threads

Category: Engine Topic started 05 Jan 2026 15:22, by tobeerortobike
212 Views
Last Post by hardrockminer 06 Jan 2026 18:21
14 Replies

Upgrading a KZ400 engine with 440 cylinders and oversize pistons

Category: Engine Topic started 28 Dec 2025 05:36, by quantity
346 Views
Last Post by Stereordinary 05 Jan 2026 23:45
3 Replies

ID me

Category: Engine Topic started 27 Dec 2025 23:18, by Mr. E
193 Views
Last Post by Mr. E 02 Jan 2026 15:31
22 Replies

How f***** am I?

Category: Engine Topic started 21 Jul 2021 17:51, by 1980 Z1R D3
3217 Views
Last Post by daveo 02 Jan 2026 14:11
3 Replies

Crankshaft oil pump gear

Category: Engine Topic started 31 Dec 2025 19:04, by richard-GPZ
129 Views
Last Post by daveo 01 Jan 2026 09:35
11 Replies

Break-in Oil?

Category: Engine Topic started 30 Dec 2025 09:52, by daveo
193 Views
Last Post by slmjim+Z1BEBE 31 Dec 2025 04:11
26 Replies

POOR PERFORMANCE

Category: Engine Topic started 26 Dec 2025 10:14, by chuck hahn
637 Views
Last Post by chuck hahn 29 Dec 2025 17:43
70 Replies

Top-End Reassembly

Category: Engine Topic started 24 Oct 2025 00:16, by daveo
3492 Views
Last Post by daveo 24 Dec 2025 07:03
14 Replies

cylinder pressure

Category: Engine Topic started 19 Dec 2025 04:53, by GrzegorzSadoch
445 Views
Last Post by kevski 22 Dec 2025 09:04
58 Replies

Problems installing Andrews x3 camshafts

Category: Engine Topic started 07 Oct 2025 02:40, by v.f.
2072 Views
Last Post by daveo 10 Dec 2025 11:36
8 Replies

Clutch basket rebuild Z1, 900, KZ1000

Category: Engine Topic started 19 Feb 2024 12:40, by Vinsky
1542 Views
Last Post by Vinsky 08 Dec 2025 16:15
3 Replies

ATU - will a KZ650 Twin ignition advance unit fit a KZ440 Ltd

Category: Engine Topic started 03 Dec 2025 09:01, by Utton
192 Views
Last Post by Wookie58 03 Dec 2025 09:55
3 Replies

Cam Cap Locating Pin / Bolt Guide

Category: Engine Topic started 01 Dec 2025 19:11, by Mlodge
289 Views
Last Post by TexasKZ 02 Dec 2025 14:11
5 Replies

Petcock leaking on 1978

Category: Engine Topic started 01 Dec 2025 15:01, by Balut
228 Views
Last Post by asphalt900 02 Dec 2025 00:43
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