Engine 17.5k topics

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

What was the last air-cooled in-line 4 from Big K?

Category: Engine Topic started 17 May 2025 11:29, by chopper1963
425 Views
Last Post by H1Vindicator 17 May 2025 12:36
9 Replies

Valve guide seal replacement without head removal

Category: Engine Topic started 13 May 2025 04:46, by Bozo
896 Views
Last Post by Bozo 13 May 2025 17:17
17 Replies

KZ305 Cam Shaft Seal Leaking

Category: Engine Topic started 03 Mar 2025 12:33, by Matratt3
1373 Views
Last Post by Matratt3 12 May 2025 08:49
2 Replies

Do I need a cylinder reserve or a rebore

Category: Engine Topic started 09 May 2025 14:57, by Tjpgi
470 Views
Last Post by Tjpgi 09 May 2025 15:27
4 Replies

87 KZ305 Spring Plate Pusher not springy

Category: Engine Topic started 02 May 2025 07:13, by Matratt3
628 Views
Last Post by Matratt3 07 May 2025 16:56
4 Replies

Z1000J Output Shaft Collar

Category: Engine Topic started 05 May 2025 23:15, by Glenn_22
644 Views
Last Post by Glenn_22 06 May 2025 15:22
14 Replies

J motor Fitment

Category: Engine Topic started 04 May 2025 10:31, by Formula264
1357 Views
Last Post by Wookie58 06 May 2025 12:51
14 Replies

Valves

Category: Engine Topic started 30 Apr 2025 05:02, by Sullivan
1553 Views
Last Post by Sullivan 05 May 2025 14:21
14 Replies

What would make a 1979 KZ750 Twin surge and sputter when it gets hot?

Category: Engine Topic started 01 May 2025 14:08, by AlexRocco
2172 Views
Last Post by AlexRocco 05 May 2025 08:56
10 Replies

Cylinder 1 dead, will not fire

Category: Engine Topic started 03 May 2025 06:09, by jstry11
515 Views
Last Post by Nessism 03 May 2025 15:22
4 Replies

Starter clutch/chain issue?

Category: Engine Topic started 07 Apr 2025 08:34, by Michi
652 Views
Last Post by bluejacobs 02 May 2025 05:49
18 Replies

KZ305 - 305CSR - GPz305 oil flow modification

Category: Engine Topic started 18 May 2021 15:04, by ghostdive
2876 Views
Last Post by sf4t7 01 May 2025 22:11
9 Replies

Bad crank?

Category: Engine Topic started 30 Apr 2025 10:57, by Formula264
838 Views
Last Post by Injected 01 May 2025 10:30
10 Replies

Rods

Category: Engine Topic started 28 Apr 2025 09:37, by Formula264
669 Views
Last Post by Injected 29 Apr 2025 09:06
3 Replies

1987 KZ305 Left and Right engine cover torque settings

Category: Engine Topic started 28 Apr 2025 10:22, by Matratt3
490 Views
Last Post by Matratt3 28 Apr 2025 13:04
9 Replies

750b starter chain

Category: Engine Topic started 27 Apr 2025 04:39, by Dan77kz750
559 Views
Last Post by Dan77kz750 28 Apr 2025 11:31
6 Replies

1000J Pistons

Category: Engine Topic started 23 Apr 2025 05:21, by MJinCO
502 Views
Last Post by zed1015 26 Apr 2025 06:34
55 Replies

Help with First Restart After Carb Rebuild

Category: Engine Topic started 05 Apr 2025 19:47, by SnyperX
3350 Views
Last Post by Nessism 24 Apr 2025 18:58
2 Replies

Cam Tensioner Removal Need for Camshaft REmoval?

Category: Engine Topic started 24 Apr 2025 15:50, by SnyperX
442 Views
Last Post by JR 24 Apr 2025 16:40
20 Replies

Cyl 1 issue

Category: Engine Topic started 10 Apr 2025 19:55, by jstry11
1271 Views
Last Post by jstry11 23 Apr 2025 15:15
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