Engine 17.5k topics

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

Engine Cleaning

Category: Engine Topic started 21 Feb 2026 18:07, by daveo
298 Views
Last Post by daveo 23 Feb 2026 15:58
19 Replies

Improved Crankcase Venting

Category: Engine Topic started 18 Feb 2026 17:48, by diamondnik
568 Views
Last Post by Street Fighter LTD 21 Feb 2026 09:47
10 Replies

HELP!!!! Engine block fisured!!!!!

Category: Engine Topic started 02 Feb 2026 12:55, by Ilfrid
467 Views
Last Post by daveo 17 Feb 2026 19:33
10 Replies

ID me

Category: Engine Topic started 27 Dec 2025 23:18, by Mr. E
567 Views
Last Post by urankjj 16 Feb 2026 15:30
12 Replies

Cam cap dowels

Category: Engine Topic started 07 Feb 2026 12:51, by danam
632 Views
Last Post by Wookie58 15 Feb 2026 00:46
6 Replies

Circlips

Category: Engine Topic started 14 Feb 2026 12:14, by lovethemkzs
200 Views
Last Post by sf4t7 14 Feb 2026 17:18
2 Replies

Points and condensers

Category: Engine Topic started 12 Feb 2026 07:03, by Saioro
250 Views
Last Post by slmjim+Z1BEBE 13 Feb 2026 16:55
23 Replies

Cam End Plugs + Stripped Valve Cover Threads

Category: Engine Topic started 05 Jan 2026 15:22, by tobeerortobike
1085 Views
Last Post by tobeerortobike 12 Feb 2026 11:13
4 Replies

Z900 cam box cover

Category: Engine Topic started 09 Feb 2026 10:12, by Andyp62
272 Views
Last Post by Andyp62 11 Feb 2026 06:09
52 Replies

Blown motor

Category: Engine Topic started 28 Jan 2026 06:55, by Larry G
1780 Views
Last Post by Wookie58 10 Feb 2026 10:06
5 Replies

Cam cover caps

Category: Engine Topic started 07 Feb 2026 06:08, by kznutter
291 Views
Last Post by TexasKZ 08 Feb 2026 11:24
3 Replies

Oil expander ring question

Category: Engine Topic started 06 Feb 2026 13:35, by Tjpgi
220 Views
Last Post by asphalt900 07 Feb 2026 05:04
3 Replies

Porting the Z1 by Joe Hooper

Category: Engine Topic started 02 Feb 2026 14:45, by KZQ
437 Views
Last Post by KZQ 04 Feb 2026 05:50
21 Replies

Piston rings set

Category: Engine Topic started 24 Sep 2025 14:00, by Tjpgi
2323 Views
Last Post by Tjpgi 02 Feb 2026 10:58
7 Replies

Unusual cam wear

Category: Engine Topic started 30 Jan 2026 16:35, by danam
289 Views
Last Post by asphalt900 02 Feb 2026 04:30
3 Replies

Cam chain tensioner play

Category: Engine Topic started 01 Feb 2026 14:22, by danam
256 Views
Last Post by asphalt900 02 Feb 2026 04:18
4 Replies

Z1 Transmission Bearing

Category: Engine Topic started 30 Jan 2026 20:20, by JT-NZ
308 Views
Last Post by Cra-z1 01 Feb 2026 09:33
3 Replies

anyone familiar with Gemini exhausts?

Category: Engine Topic started 17 Dec 2005 20:57, by MkII
2376 Views
Last Post by gd4now 30 Jan 2026 10:59
6 Replies

Slotted J cam sprockets

Category: Engine Topic started 29 Jan 2026 07:39, by Wookie58
263 Views
Last Post by Wookie58 30 Jan 2026 00:27
3 Replies

Z1 Kickstart Cover

Category: Engine Topic started 24 Jan 2026 19:38, by JT-NZ
286 Views
Last Post by JT-NZ 25 Jan 2026 23:12
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