Re: Max Performance - Yamaha QT50/SG50

Keegan Wilhelm /
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> Jack Rutherford wrote:

> -------------------------------------------------------

> Which reminds me of a question I had. This qt50 has the Mikuni TM24

> carb on it. It's a popular opinion to claim that the TM24 is too much

> carb for this engine.

>

> But it idles fine, accelerates really well, and I've jetted it right on

> the top end (with HPI system installed and tweaked a tad along with

> jetting, it runs in the 360s-370s). I rarely ride it so when I yank it

> out of storage, it can be a hard starter.

>

> So my question is - what would you look for in terms of starting,

> idling, accelerating and performance to determine that a carb is just

> too big for a bike?

this is from my thread. i was asking about putting a vm20 on a 50cc motor.

"You can attempt to put a VM18 on this, but general rule of thumb is you want venturi size to be at most 50% of bore. So, on a 38mm~ cylinder you wan a ~18mm carb max (and that's theoretical maximum, so including a pipe and porting). Aka, a stock port and intake, and a 12-15mm is more than adequate and youll get better response from the smaller carb"

TM24 does seem a bit huge for a stocker 50cc. I run a tm24 on my nu/nx motor, but im also running a heavily modified h2o setup that spins the motor to ~10k rpm

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Subject Written By Posted
  Max Performance - Yamaha QT50/SG50Topic by: Christoffer Janner Christoffer Janner 05/03/22 04:55AM
  Re: Max Performance - Yamaha QT50/SG50Re: Dirty30 Dillon Dirty30 Dillon 05/03/22 06:01AM
  Re: Max Performance - Yamaha QT50/SG50Re: Peter v. Peter v. 05/03/22 07:36AM
  Re: Max Performance - Yamaha QT50/SG50Re: Stephen Keller Stephen Keller 05/06/22 10:16PM
  Re: Max Performance - Yamaha QT50/SG50Re: Peter v. Peter v. 05/07/22 05:44AM
  Re: Max Performance - Yamaha QT50/SG50Re: Full Tuck Full Tuck 05/03/22 07:41AM
  Re: Max Performance - Yamaha QT50/SG50Re: Graham Motzing Graham Motzing 05/03/22 01:56PM
  Re: Max Performance - Yamaha QT50/SG50Re: Dirty30 Dillon Dirty30 Dillon 05/03/22 04:43PM
  Re: Max Performance - Yamaha QT50/SG50Re: Jack Rutherford Jack Rutherford 05/03/22 02:33PM
  Re: Max Performance - Yamaha QT50/SG50Re: Jack Rutherford Jack Rutherford 05/03/22 02:40PM
  Re: Max Performance - Yamaha QT50/SG50Re: Keegan Wilhelm Keegan Wilhelm 05/03/22 02:51PM
  Re: Max Performance - Yamaha QT50/SG50Re: Jack Rutherford Jack Rutherford 05/03/22 03:23PM
  Re: Max Performance - Yamaha QT50/SG50Re: Peter v. Peter v. 05/03/22 05:04PM
  Re: Max Performance - Yamaha QT50/SG50Re: Dirty30 Dillon Dirty30 Dillon 05/03/22 06:04PM
  Re: Max Performance - Yamaha QT50/SG50Re: Peter v. Peter v. 05/04/22 09:29AM
  Re: Max Performance - Yamaha QT50/SG50Re: Dirty30 Dillon Dirty30 Dillon 05/04/22 01:12PM
  Re: Max Performance - Yamaha QT50/SG50Re: Isaiah Rolon Isaiah Rolon 05/10/22 02:47AM

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