32mm Polini PWK Carburetor experiment
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Finally getting somewhere with this carburetor, sorry for the wait, had a little incident with buying a car I definitely shouldn't of bought haha.
Was having severe spluttering with the DT all the way to main jet, the bike would literally barely run under load unless you were flat out. Narrowed this down to the needle and invested in a polini needle kit. Currently running a 140 main and 42 pilot, along with the standard N68E needle. The bike actually fouled it's plug after trying to startup again after a 5 mile ride, it was running allot worse in the 15 degrees weather we had compared to when I last played with it in around 5 degrees weather. I tried the leaner JJK needle and found it was bogging on big throttle inputs, so raised it a notch to find the bike had transformed. I just went a short 10 mile ride and the bike is a totally new beast, miles better than standard carb, loads of torque from idle. The only issue I'm finding now is a splutter at low throttle say 1/8th under, so I'm guessing the pilot is rich. However upon checking the new plug I fitted the bikes running abit lean, so tonight I fitted a JJN needle, which from what I can gather will give a leaner low end with richer mid and top, I've left it in the mid position for now. Once this weather clears up Abit and I'm back off work I'll give the bike another shot and post an update, but I'm finally glad to be getting somewhere with this bike, as it was proving a minefield a while ago. -
@Glynn123
Be careful of the float level, the angle of the inlet isn't suited for most carbs. It's a real pain in the ass to setup.
I ran a Mikuni TM32 with a WR200 Inlet manifold and it was good but always had trouble with float control.
The Mikuni TMss with angled venturi design just works for me.
The WR200 had a TM30ss, I've used a TM34ss from a Suzuki RGV 250 VJ22, which worked well,
Keep it real
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@Darty ah right cheers, I've had no issues so far on the standard float height the carb came with, what symptoms should I be looking for? Just a bog when holding bike wot for a while? Had bike flat out for a good minute or so in 6th and never seen any issues?
