Re: Derbi Start V (Fiiiiiiiive)

Moped Newbie /
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Looking for some tuning advice.

I have a Start V with 65 cc metrakit, TM24 (15 idle jet, 165 main jet, middle needle position, 5n13 needle) 6 gram weights, 16/33 gearing, removed starter clutch, stock contra and variator. Rk replica huge moped pipe w/ black baffle. Malossi reeds. Timing 1.8mm. No air leaks with leak down test.

The bike is 4 stroking - a lot at 1/2 to WOT and less frequently at WOT. The bike accelerates decently until 1/2 throttle then there is a lot of hesitation and losing of power and spitting gas.

I have tried leaning the main down to 115 and needle position but this makes the bike run worst and there is still a lot of 4 stroking in the mid range. The plug looks to be on the richer side but not bad. The head temps hang around high 200s. Leaning up the main jet did improve the spitting of gas.

I was looking on the tuning spreadsheet. There is another guy with a metrakit, start 5, with a tm28 with a 185 main jet.

I feel like I need to down jet but I do not have any reference and the lowest jet I have is 115. Or am I totally out of the ballpark and need a leaner needle?

This single post is part of a larger thread. Start from the top or view this post in context.
Subject Written By Posted
  Derbi Start V (Fiiiiiiiive)Topic by: Joel P Joel P 01/06/20 12:59AM
  Re: Derbi Start V (Fiiiiiiiive)Re: todd amundson todd amundson 01/06/20 11:48AM
  Re: Derbi Start V (Fiiiiiiiive)Re: Daniel '' Daniel '' 01/06/20 02:06PM
  Re: Derbi Start V (Fiiiiiiiive)Re: ck 🌧🌧🌧 ck 🌧🌧🌧 01/06/20 10:22PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Buttcheeks BUZZARD Buttcheeks BUZZARD 01/07/20 02:10PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Saabsonettguy . Saabsonettguy . 01/07/20 02:37PM
  Re: Derbi Start V (Fiiiiiiiive)Re: T y l e r T y l e r 01/13/20 05:48PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Joel P Joel P 01/13/20 10:10PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Blake MD No PM Plz Blake MD No PM Plz 01/13/20 10:15PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Moped Newbie Moped Newbie 04/28/20 11:14AM
  Re: Derbi Start V (Fiiiiiiiive)Re: Daniel '' Daniel '' 04/28/20 11:47AM
  Re: Derbi Start V (Fiiiiiiiive)Re: Joel P Joel P 04/28/20 12:27PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Daniel '' Daniel '' 04/28/20 02:35PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Joel P Joel P 05/01/20 12:26AM
  Re: Derbi Start V (Fiiiiiiiive)Re: Daniel '' Daniel '' 05/03/20 12:48PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Joel P Joel P 05/03/20 09:53PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Joel P Joel P 06/11/20 09:56PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Joel P Joel P 06/12/20 02:05AM
  Re: Derbi Start V (Fiiiiiiiive)Re: Joel P Joel P 06/13/20 11:29PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Joel P Joel P 06/26/20 02:15PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Buttcheeks BUZZARD Buttcheeks BUZZARD 06/26/20 04:02PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Brandon Weiss (Detective brandon to you) Brandon Weiss (Detective brandon to you) 06/26/20 05:54PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Russell Huddy Russell Huddy 06/30/20 03:07PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Joel P Joel P 06/30/20 11:30PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Blake MD No PM Plz Blake MD No PM Plz 07/12/20 10:47PM
  Re: Derbi Start V (Fiiiiiiiive)Re: EH FCC of the QCB EH FCC of the QCB 07/12/20 11:28PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Joel P Joel P 06/30/20 11:33PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Russell Huddy Russell Huddy 06/30/20 11:42PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Moped Newbie Moped Newbie 07/12/20 08:10PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Moped Newbie Moped Newbie 07/19/20 12:21PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Calvin King Calvin King 10/29/20 11:45PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Joel P Joel P 10/30/20 06:36AM
  Re: Derbi Start V (Fiiiiiiiive)Re: Terry Kilby Terry Kilby 10/30/20 03:01PM
  Re: Derbi Start V (Fiiiiiiiive)Re: jordan * jordan * 10/31/20 08:51PM
  Re: Derbi Start V (Fiiiiiiiive)Re: todd amundson todd amundson 12/28/20 03:32PM
  Re: Derbi Start V (Fiiiiiiiive)Re: jordan * jordan * 12/29/20 03:03PM
  Re: Derbi Start V (Fiiiiiiiive)Re: todd amundson todd amundson 12/29/20 03:32PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Moped Newbie Moped Newbie 12/28/20 03:12PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Lawrence Au Lawrence Au 12/29/20 12:39PM
  Re: Derbi Start V (Fiiiiiiiive)Re: Joel P Joel P 12/29/20 06:51PM

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