Hi Guys,
Not sure if anyone remembers my original post in Eric Gorr's Forward Motion but I just wanted to give you the update after my PWK39 purchase for the CR5.
Well there's more power everywhere as you'd expect but the blubbering is still there!!... just off closed throttle now (upto 1/8 only) To be fair the guys down here who sold me the Carb (which came with a 'tuned by Sudco' sticker on it btw!) have been really good and are geniuely trying to help sort it, I've had 3 different needles from them now trying to correct this, standard is DGH... and I've tried DGJ/K/L, all of which having a wider 'straight section' diameter only, so it should be effecting the A/F mixture in the right area... still no good. I'm beggining to think I'm trying to tune out a charecteristic of the CR5 engine that can't be removed! (and so is the shop). Not sure what the next step is now, thought about a bigger slide cut-away but if I'm reading Eric's article(s) right, that would affect the A/F mixture at a slight larger throttle opening than where the problem is... and at $120 per slide, I really can't afford to be guessing. Other charecteristics since the carb change... popping from the exhaust almost immediatley after the throttle is closed (at any rpm)... the bike was also quite smokey at idle on the standard 60 pilot, I changed this with the 55 from my PJ carb (which is actually 2 sizes down) just to see the difference, less smokey but it had no effect on on the problem, nor did any air screw setting from 1 to 3 turns with the 55 or 60 pilot installed... so, for want of a techinical term.... I dunno !?!?
Anyway, any thoughts on this would be appreciated.
Dave.
Not sure if anyone remembers my original post in Eric Gorr's Forward Motion but I just wanted to give you the update after my PWK39 purchase for the CR5.
Well there's more power everywhere as you'd expect but the blubbering is still there!!... just off closed throttle now (upto 1/8 only) To be fair the guys down here who sold me the Carb (which came with a 'tuned by Sudco' sticker on it btw!) have been really good and are geniuely trying to help sort it, I've had 3 different needles from them now trying to correct this, standard is DGH... and I've tried DGJ/K/L, all of which having a wider 'straight section' diameter only, so it should be effecting the A/F mixture in the right area... still no good. I'm beggining to think I'm trying to tune out a charecteristic of the CR5 engine that can't be removed! (and so is the shop). Not sure what the next step is now, thought about a bigger slide cut-away but if I'm reading Eric's article(s) right, that would affect the A/F mixture at a slight larger throttle opening than where the problem is... and at $120 per slide, I really can't afford to be guessing. Other charecteristics since the carb change... popping from the exhaust almost immediatley after the throttle is closed (at any rpm)... the bike was also quite smokey at idle on the standard 60 pilot, I changed this with the 55 from my PJ carb (which is actually 2 sizes down) just to see the difference, less smokey but it had no effect on on the problem, nor did any air screw setting from 1 to 3 turns with the 55 or 60 pilot installed... so, for want of a techinical term.... I dunno !?!?
Anyway, any thoughts on this would be appreciated.
Dave.
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