According to their website the tapered design is from 38mm to 36mm. Is this the carb to get? http://store.powerapt.com/prod_display.php?prod_ref=4
The 36 is the size I got and sent to Kelly that he has tested on his 125 and will soon be testing on his 165. They were out of 38's and I couldn't/wouldn't wait so I went with the 36. I can't even remember what they said would be different in terms of power delivery between the 36 and 38's.
you have one too I will take a picture but the bore is for sure smaller on the bottom than the top. Looks like a taper bore to me. Toro618 - It is number 0000004 so you could call them and ask.
Yep Kelly I just checked and I have (HAD ) the 36 straight; cost was $775.00 ($787.00 after shipping). The taper bore carbs are $875.00. They all have the funny shape to them; kinda light bulb shaped and not round.
LOL I don't know what to call it but it sure works . I asked them about the taper bore carbs and they were out of them too so I didn't even ask what the difference would be. They did feel the 36 was a good match for the 125-300 for the type of riding I do.
The taper-bore will probably be 38mm on the machined-bore on the airbell side, and taper down to a 36mm nominal bore after the slide. The straight would be 36mm on both sides of the slide. The shape of the venturi, with it smaller at the bottom of the slide, maximizes low-speed intake velocity without sacraficing top-end flow. It would help explain the awesome response and low-end gains, no doubt.
All over. I am from the South. I live in Mississippi and ride the Southern Enduro Riders Asso. Events (My Wife, Debbie is SERA President) and I ride a lot of Nat'l Enduros still.
Kelly can contact me and borrow it. I won't be riding for 3 months. Shoulder Surgery next week (HemiArthroplasty). Kelly, Pay shipping both ways and you can borrow it for a week or two. I got a call today saying the Lectron is sitting at the shop that I keep my Vintage bikes at and buy most of my stuff from other than from Hall's Cycles and Motosportz.
The Taper bore or as Lectron calls them High Veocity Carb is actually mainly for racing that restricts sizes of carbs so a smaller bore will flow like a larger carb. Lectron recommends staying to smooth bore for most applications.
I just got a text from him a bit ago, saying the 165 is installed.... I'm burried at work, so I doubt I'll get to try it this weekend.. On the other hand, I'm making money
