• Welcome to 2 STROKE WORLD .net.
 

News:

MSRs 78 400 , My hybrid and a random German tractor






Main Menu

Gray Ghost 421

Started by Kawtriplefreak, June 06, 2025, 07:04:32 AM

Previous topic - Next topic

0 Members and 1 Guest are viewing this topic.

Kawtriplefreak


SoCal250

75 Yamaha RD125B   75 Yamaha RD125B (project)
75 Yamaha RD250B   75 Yamaha RD200B (project)
73 Yamaha RD350     77 Yamaha RD400D   79 Yamaha RD400F  
91 Yamaha TZR250R  89 Yamaha FZR400   05 Yamaha FZ6   
05 Yamaha XT225TC  82 Honda MB5  02 Aprilia RS250 Cup (sold)

Kawtriplefreak

Yep. Athena based. Wicked pipes. Not sure which carbs yet.

Kawtriplefreak

All-inclusive 421 kit made for RZs ordered from AZ quads. Supposed to be here Thursday. Pipes from Wicked are next, then decide on carbs. Leaning towards 36 MM Lectrons or Smart Carbs, but damn they are pricey...
Disassembly continues.

Kawtriplefreak

After further study and a consultation with M in SC looks like Kehin PWK...

Kawtriplefreak

#5


Kit arrived today. This version has the temp sensor hole for use in a RZ. Also coordinated with Gary (Arrow) on the RD LC Crazy forum in the UK to do his magic 421 pump rebuild and upgrade.

mnein

Love to see what you're doing with this! Keep us informed.
Arrow is the man for pumps.

Kawtriplefreak

Snagged a set of new Keihin PWK 35s set up for this build. If I can ever get Roger on the phone, I will order the big bore stainless steel pipes.  Research indicates center stand has to come off. 

RustyRD

I think you will like the way those PWK carbs work, I have these on my RD400 engine and cannot believe how hard it pulls from just above idle on through the RPM range.

Kawtriplefreak

I am looking forward to it.

RustyRD

For what it's worth I Purchased my pwk carbs from F.A.S.T farm and sand toys. Good experience with them. Lots of banshee items , a lot of which will work with RZ as you already know. good prices

Kawtriplefreak

Order placed for Wicked stainless steel big bore hybrid RZ up pipes. 3 week lead time :celebrate:  :celebrate:

SoCal250

75 Yamaha RD125B   75 Yamaha RD125B (project)
75 Yamaha RD250B   75 Yamaha RD200B (project)
73 Yamaha RD350     77 Yamaha RD400D   79 Yamaha RD400F  
91 Yamaha TZR250R  89 Yamaha FZR400   05 Yamaha FZ6   
05 Yamaha XT225TC  82 Honda MB5  02 Aprilia RS250 Cup (sold)

RustyRD


Simmons1

Quote from: Kawtriplefreak on June 16, 2025, 07:21:36 PMOrder placed for Wicked stainless steel big bore hybrid RZ up pipes. 3 week lead time :celebrate:  :celebrate:

That is quick. Lead time on the Ohaz pipes for my TDR is 3 months.