Engine

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Piston sizes

Last post by KR-1R « Wed Jun 19, 2019 2:53 am
Replies: 4
by Skinnybob46 » Sun May 19, 2019 8:01 pm

4 Replies

911 Views

Last post by KR-1R
Wed Jun 19, 2019 2:53 am
Useful setup and engine build link (Eric Gorr)

Last post by KR-1R « Wed Oct 16, 2013 4:42 am
Replies: 11
by dave32 » Wed Sep 12, 2012 11:40 pm

11 Replies

7996 Views

Last post by KR-1R
Wed Oct 16, 2013 4:42 am
jollymoto exhaust an v force reeds jetting

Last post by slashing « Sat Aug 17, 2019 11:32 pm

by slashing » Sat Aug 17, 2019 11:32 pm

0 Replies

9 Views

Last post by slashing
Sat Aug 17, 2019 11:32 pm
Gearbox output shaft seals - now obsolete

Last post by Coose « Fri Jul 05, 2019 6:09 pm
Replies: 5
by Coose » Wed Jul 03, 2019 12:11 pm

5 Replies

533 Views

Last post by Coose
Fri Jul 05, 2019 6:09 pm
Head gasket failure causes

Last post by Coose « Wed Jul 03, 2019 7:07 am
Replies: 13
by Professor » Tue Sep 25, 2018 9:53 am

13 Replies

1067 Views

Last post by Coose
Wed Jul 03, 2019 7:07 am
Info on Wideband air fuel ratio meter

Last post by scooble « Sun May 05, 2019 8:04 pm
Replies: 5
by fred » Sat May 04, 2019 9:16 pm

5 Replies

357 Views

Last post by scooble
Sun May 05, 2019 8:04 pm
How to tell crank seals need replacing?

Last post by podman « Sun Apr 28, 2019 8:25 pm
Replies: 3
by SeanW » Thu Apr 25, 2019 12:54 pm

3 Replies

266 Views

Last post by podman
Sun Apr 28, 2019 8:25 pm
KIPS Valve Oil Seal

Last post by Davy_G « Sun Apr 28, 2019 11:41 am
Replies: 2
by Davy_G » Thu Apr 25, 2019 8:29 pm

2 Replies

134 Views

Last post by Davy_G
Sun Apr 28, 2019 11:41 am
remote carb idle screw

Last post by SeanW « Fri Apr 26, 2019 12:53 pm

by SeanW » Fri Apr 26, 2019 12:53 pm

0 Replies

98 Views

Last post by SeanW
Fri Apr 26, 2019 12:53 pm
Pump or pre mix

Last post by KR-1R « Wed Apr 03, 2019 11:26 pm
Replies: 5
by Pwrnp31 » Thu Mar 21, 2019 2:17 pm

5 Replies

621 Views

Last post by KR-1R
Wed Apr 03, 2019 11:26 pm
earth electrode worn/ piston crown melted

Last post by tzkr1s « Wed Apr 03, 2019 10:09 pm
Replies: 4
by yatasaki » Mon Nov 12, 2012 8:52 pm

4 Replies

839 Views

Last post by tzkr1s
Wed Apr 03, 2019 10:09 pm
Zeeltronic Ignition Map

Last post by Mbuk « Fri Mar 22, 2019 7:09 pm
Replies: 3
by Mbuk » Thu Mar 21, 2019 11:27 pm

3 Replies

234 Views

Last post by Mbuk
Fri Mar 22, 2019 7:09 pm
Radiator Guard

Last post by Garry « Tue Mar 19, 2019 9:10 am
Replies: 3
by Pops » Sat Mar 16, 2019 4:36 pm

3 Replies

229 Views

Last post by Garry
Tue Mar 19, 2019 9:10 am
Power valve removal

Last post by JanBros « Wed Mar 13, 2019 9:33 am
Replies: 5
by Spanky » Sat Mar 09, 2019 7:31 am

5 Replies

384 Views

Last post by JanBros
Wed Mar 13, 2019 9:33 am
Nikon pipes

Last post by 500bernie « Wed Mar 06, 2019 8:50 pm
Replies: 6
by Robypvs » Fri Mar 01, 2019 3:38 pm

6 Replies

396 Views

Last post by 500bernie
Wed Mar 06, 2019 8:50 pm
barrel platers recommendations please

Last post by KR-1R « Sun Mar 03, 2019 4:21 am
Replies: 7
by fred » Fri Mar 01, 2019 9:25 pm

7 Replies

325 Views

Last post by KR-1R
Sun Mar 03, 2019 4:21 am
Vforce reed valve?

Last post by Kawakaare « Fri Feb 15, 2019 5:05 pm
Replies: 13
by Kawakaare » Tue Feb 12, 2019 11:31 pm

13 Replies

822 Views

Last post by Kawakaare
Fri Feb 15, 2019 5:05 pm
Kr1 v kr1s barrel

Last post by brettsa « Thu Feb 14, 2019 7:09 pm
Replies: 1
by brettsa » Thu Feb 14, 2019 6:45 pm

1 Replies

195 Views

Last post by brettsa
Thu Feb 14, 2019 7:09 pm
anyone recommend a crankshaft rebuilder

Last post by NOSHER « Wed Jan 16, 2019 4:21 pm
Replies: 6
by NOSHER » Sun Jan 13, 2019 12:39 am

6 Replies

677 Views

Last post by NOSHER
Wed Jan 16, 2019 4:21 pm
1 cylinder intermittent firing

Last post by Skinnybob46 « Fri Jan 04, 2019 10:36 am
Replies: 5
by Skinnybob46 » Sun Dec 09, 2018 9:19 pm

5 Replies

806 Views

Last post by Skinnybob46
Fri Jan 04, 2019 10:36 am
spraying engine ?

Last post by kinkyfreestyler « Tue Jan 01, 2019 11:50 am
Replies: 8
by kinkyfreestyler » Wed Dec 26, 2018 12:38 am

8 Replies

726 Views

Last post by kinkyfreestyler
Tue Jan 01, 2019 11:50 am
KMX oversized piston.

Last post by stevo135+ « Tue Nov 06, 2018 8:26 pm
Replies: 8
by stevo135+ » Sat Jul 14, 2018 11:39 pm

8 Replies

2059 Views

Last post by stevo135+
Tue Nov 06, 2018 8:26 pm
Fitting the YZF450 Radiator

Last post by 500bernie « Wed Oct 10, 2018 11:45 pm
Replies: 2
by 500bernie » Tue Oct 09, 2018 9:57 pm

2 Replies

724 Views

Last post by 500bernie
Wed Oct 10, 2018 11:45 pm
boggy running between 3-5k at 1/4 throttle

Last post by EGG « Wed Oct 03, 2018 11:55 am
Replies: 5
by EGG » Mon Oct 01, 2018 1:45 pm

5 Replies

748 Views

Last post by EGG
Wed Oct 03, 2018 11:55 am
Squish clearance and compression ratio - advice please!

Last post by JanBros « Sat Jul 28, 2018 10:15 am
Replies: 31
by James P » Sun Jan 18, 2015 7:19 am
1

2

3
31 Replies

5712 Views

Last post by JanBros
Sat Jul 28, 2018 10:15 am
Poor low speed running.

Last post by dmac « Fri Jul 27, 2018 5:50 pm
Replies: 14
by Tony » Tue Nov 15, 2011 11:20 pm

14 Replies

2138 Views

Last post by dmac
Fri Jul 27, 2018 5:50 pm
Balance shaft rebuild?

Last post by Joe439 « Thu Jul 12, 2018 3:42 am
Replies: 6
by Joe439 » Wed Feb 28, 2018 11:32 pm

6 Replies

1323 Views

Last post by Joe439
Thu Jul 12, 2018 3:42 am
not rev'ing past7500

Last post by Mouser « Sun Jul 08, 2018 8:31 pm
Replies: 43
by Mouser » Sat May 26, 2018 4:06 pm
1

2

3
43 Replies

4050 Views

Last post by Mouser
Sun Jul 08, 2018 8:31 pm
CRANK SEAL REPLACEMENT

Last post by NOSHER « Sun Jun 03, 2018 11:09 am
Replies: 12
by NOSHER » Sun Nov 05, 2017 8:29 pm

12 Replies

2258 Views

Last post by NOSHER
Sun Jun 03, 2018 11:09 am
reverse gear selector ? race box ?

Last post by JanBros « Sun May 06, 2018 2:48 pm
Replies: 3
by kinkyfreestyler » Mon Apr 30, 2018 9:56 pm

3 Replies

895 Views

Last post by JanBros
Sun May 06, 2018 2:48 pm
PWK jet block o-ring?

Last post by Binetta Steve « Sun Apr 15, 2018 12:57 pm
Replies: 3
by Tim61 » Tue Apr 10, 2018 7:05 pm

3 Replies

844 Views

Last post by Binetta Steve
Sun Apr 15, 2018 12:57 pm
combustion chamber profile for pump petrol road

Last post by JanBros « Sun Mar 04, 2018 11:21 am
Replies: 1
by fred » Sun Mar 04, 2018 3:54 am

1 Replies

646 Views

Last post by JanBros
Sun Mar 04, 2018 11:21 am
Tonnage for crank press ?

Last post by fred « Wed Feb 28, 2018 6:36 pm
Replies: 3
by fred » Wed Feb 07, 2018 9:21 pm

3 Replies

870 Views

Last post by fred
Wed Feb 28, 2018 6:36 pm
2 stroke software

Last post by Binetta Steve « Sat Feb 03, 2018 11:30 pm
Replies: 10
by JanBros » Mon Aug 08, 2011 8:41 pm

10 Replies

2753 Views

Last post by Binetta Steve
Sat Feb 03, 2018 11:30 pm
crank right end gear

Last post by Binetta Steve « Tue Nov 07, 2017 7:43 pm
Replies: 3
by bsa70 » Fri Sep 25, 2015 2:04 pm

3 Replies

1210 Views

Last post by Binetta Steve
Tue Nov 07, 2017 7:43 pm
CRANK LEFT HAND BEARING REMOVAL ISSUE, Magneto side

Last post by bsa70 « Tue Nov 07, 2017 5:16 pm
Replies: 2
by bsa70 » Tue Dec 01, 2015 10:05 pm

2 Replies

1039 Views

Last post by bsa70
Tue Nov 07, 2017 5:16 pm
PWK ENGINE IDLE

Last post by Garry « Thu Sep 21, 2017 1:09 pm
Replies: 37
by NOSHER » Sun Aug 27, 2017 6:06 pm
1

2

3
37 Replies

6131 Views

Last post by Garry
Thu Sep 21, 2017 1:09 pm
The engine will not start.

Last post by Luders « Fri Sep 01, 2017 9:42 pm
Replies: 9
by dirk » Mon Aug 07, 2017 9:52 pm

9 Replies

2206 Views

Last post by Luders
Fri Sep 01, 2017 9:42 pm
1mm skimmed head Squish Clearance Part two

Last post by KR1 Man « Fri Jul 14, 2017 11:18 am
Replies: 3
by KR1 Man » Wed Jun 21, 2017 4:33 pm

3 Replies

1144 Views

Last post by KR1 Man
Fri Jul 14, 2017 11:18 am
Balancer shaft question

Last post by dandan0162 « Wed Jul 05, 2017 9:54 pm
Replies: 9
by dandan0162 » Mon Jun 26, 2017 10:18 am

9 Replies

2173 Views

Last post by dandan0162
Wed Jul 05, 2017 9:54 pm
1mm skimmed head, squish clearance

Last post by JanBros « Wed Jun 14, 2017 6:20 pm
Replies: 1
by KR1 Man » Wed Jun 14, 2017 1:29 pm

1 Replies

847 Views

Last post by JanBros
Wed Jun 14, 2017 6:20 pm
Mitaka pistons - OK now or not?

Last post by DeadHammer « Wed Apr 19, 2017 8:14 am
Replies: 2
by DeadHammer » Tue Mar 07, 2017 6:41 pm

2 Replies

1230 Views

Last post by DeadHammer
Wed Apr 19, 2017 8:14 am
35mm Carb holder rubbers manufacture - Reed side

Last post by Gerrit « Wed Apr 12, 2017 4:53 pm
Replies: 57
by KR-1R » Mon Oct 05, 2009 8:42 am
1

2

3

4
57 Replies

19570 Views

Last post by Gerrit
Wed Apr 12, 2017 4:53 pm
Piston failure

Last post by Professor « Tue Mar 07, 2017 9:51 am
Replies: 4
by jarno » Sat Aug 13, 2016 7:57 pm

4 Replies

1474 Views

Last post by Professor
Tue Mar 07, 2017 9:51 am
Apticote or Nikasil and a couple of other questions please..

Last post by DeadHammer « Fri Mar 03, 2017 6:10 pm
Replies: 4
by DeadHammer » Fri Feb 24, 2017 6:08 pm

4 Replies

1478 Views

Last post by DeadHammer
Fri Mar 03, 2017 6:10 pm
Reed petals

Last post by TwoStroke Institute « Tue Feb 28, 2017 1:44 pm
Replies: 16
by gangus » Tue Jan 31, 2017 2:14 am
1

2
16 Replies

3799 Views

Last post by TwoStroke Institute
Tue Feb 28, 2017 1:44 pm
My heart is broke

Last post by R1andy « Fri Feb 24, 2017 6:38 pm
Replies: 6
by R1andy » Mon Feb 20, 2017 11:20 pm

6 Replies

1966 Views

Last post by R1andy
Fri Feb 24, 2017 6:38 pm
SP pipes....apparently

Last post by Luders « Sat Feb 18, 2017 10:01 pm
Replies: 4
by scooble » Sat Feb 18, 2017 12:16 pm

4 Replies

1481 Views

Last post by Luders
Sat Feb 18, 2017 10:01 pm
Coolant leak that I can't stop

Last post by Dragongoal « Tue Feb 14, 2017 10:50 am
Replies: 5
by R1andy » Mon Aug 29, 2016 7:59 pm

5 Replies

1445 Views

Last post by Dragongoal
Tue Feb 14, 2017 10:50 am
PWK 28mm pattern carbs on flebay

Last post by podman « Wed Feb 08, 2017 10:42 pm
Replies: 13
by Sean7r » Thu Jan 19, 2017 9:07 pm

13 Replies

4268 Views

Last post by podman
Wed Feb 08, 2017 10:42 pm

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