So I purchased a Keihin PWK38 refurb/service kit for 10 Euros including p&p!
I have a 2004 EC300 with PWK38 AS1 Screw Top Carb. Had it a few years, got it jetted just nice (using genuine Keihin jets and needle) but I still had a few niggles with the carb... intermittently overflowed fuel, idle was unstable, etc.
I don't use the bike for competition, leisure use only but I ride it hard.
I spotted the PWK38 refurb/service kit on eBay from China for only 10 Euros with postage, for the money I thought I'd give it a try!
Obviously, it's not genuine Keihin, some people may call it 'fake' others may call it 'pattern' but it contained some parts that would be very useful...if they worked!
kit.jpg
So after 2 weeks it arrived and I have to say I was pleasantly surprised.
As well as other parts, the kit included a Main Jet, Pilot Jet, Needle and Slide. I decided I wouldn't be using these and put them to one side.
Here's a list of the parts I used from the kit...
1. Float - Original float had been bent/adjusted many times, its tang was deformed and I didn't trust it.
2. Float valve - Original float valve looked in good condition but the rubber tip had hardened and the spring action of the spring loaded pin seemed very light.
3. Choke plunger - The rubber tip had hardened and was indented.
4. Float Bowl seal and Jet Block seal - both rubber seals had hardened and flattened.
5. Air Screw - It had a ridge on its tapered tip.
6. Plastic Idle Screw - Screw head was damaged and tip worn.
I stripped and cleaned the carb, fitted the replacement parts. The float/float valve needed no adjustment. Straight out of the box they gave me a float height of 16mm with the float seam parallel to the bowl mating surface.
I've had a 3 hour ride on the bike this afternoon and all is good. The intermittent carb overflow is fixed and I can adjust the air screw/idle screw to give a stable idle.
If I was using the bike for serious competition then I'd happily spend money on genuine Keihin parts, but for what I need I'm very happy with my 10 Euros kit!
