Engine 17.5k 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
35.3k 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
 
66 Replies

Terrible motor swap idea kz440

Category: Engine Topic started 22 Dec 2025 07:42, by bound
1109 Views
Last Post by bound Today 20:45
18 Replies

Upgrading a KZ400 engine with 440 cylinders and oversize pistons

Category: Engine Topic started 28 Dec 2025 05:36, by quantity
468 Views
Last Post by quantity Yesterday 01:17
87 Replies

Top-End Reassembly

Category: Engine Topic started 24 Oct 2025 00:16, by daveo
4029 Views
Last Post by daveo 16 Jan 2026 12:39
11 Replies

One simple question

Category: Engine Topic started 13 Jan 2026 10:01, by lovethemkzs
141 Views
Last Post by lovethemkzs 16 Jan 2026 11:03
5 Replies

Wiseco 810 piston rings

Category: Engine Topic started 11 Jan 2026 12:36, by turboguzzi
124 Views
Last Post by rangeroy 15 Jan 2026 09:23
13 Replies

650/750 engine in Z1 frame?

Category: Engine Topic started 12 Jan 2026 08:32, by Sixten
259 Views
Last Post by sf4t7 13 Jan 2026 16:13
15 Replies

Break-in Oil?

Category: Engine Topic started 30 Dec 2025 09:52, by daveo
372 Views
Last Post by daveo 11 Jan 2026 21:43
21 Replies

Whelp! I found the problem.

Category: Engine Topic started 05 Jan 2026 01:47, by Stereordinary
479 Views
Last Post by Daftrusty 10 Jan 2026 15:49
6 Replies

Ignition Timing on 1000J

Category: Engine Topic started 07 Jan 2026 09:08, by MJinCO
162 Views
Last Post by MJinCO 10 Jan 2026 15:01
3 Replies

Choke plunger

Category: Engine Topic started 09 Jan 2026 15:27, by seebold
146 Views
Last Post by zed1015 10 Jan 2026 03:38
14 Replies

Cam End Plugs + Stripped Valve Cover Threads

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

ID me

Category: Engine Topic started 27 Dec 2025 23:18, by Mr. E
225 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
3308 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
157 Views
Last Post by daveo 01 Jan 2026 09:35
26 Replies

POOR PERFORMANCE

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

cylinder pressure

Category: Engine Topic started 19 Dec 2025 04:53, by GrzegorzSadoch
535 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.
2262 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
1572 Views
Last Post by Vinsky 08 Dec 2025 16:15
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