TM250 Stinger length

[ninjamk]

Hi Guys,
Im in the process of tuning my TM250 and am wondering what everyone has as the stinger length for their pipe?  I know each pipe is going to be a little different but im just looking for ballpark numbers.  I have the same pfr chamber as http://www.vmxunlimited.com/pfr-pipe-suzuki-tm250/ except with a custom made stinger which is currently around 8in in length.  I would appreciate any suggestions.

Thanks!

[albrid-3]

7 to 8  inches sound about right, then your muffler, which will slip over.

[vandy010]

whatever the Internal Diameter is x 12

[John Orchard]

I don't know if it's of any matter, back in the day, my local dealer Terry Bryant (Bryant Suzuki) was building some real quick TM's, he felt that the stock pipes were designed to run without a muffler, so when a muffler was fitted it made the stinger too long.

Terry subtracted the length of a straight-through core muffler from the stinger and welded it on there, the end of the muffler finishing at a length where the expansion chamber originally finished (before the original muffler).

[Lozza]

Makes no real difference

[jerry]

Lozza probably right but maybe estimate the length of a stinger from a 72-73 RH250. At. Least it will look good. J

[SON]

Hi Guys,
Im in the process of tuning my TM250 !!!!
Tuning it for what??

Bottom End / Mid Range / Top End
What other modifications from stock?

[ninjamk]

Thanks guys.
I would like to tune it for mid/high, as I would assume that is what stock porting will allow.  after the stinger I have a short 5 1/4 inch long muffler that has a ID that is larger than the ID of the stinger.  Everything else is stock except for 34mm VM and foam uni filter.

[Davey Crocket]

One thing to consider is the noise it will produce....you don't want something that is going to annoy the crap out of everyone.....you need something 10 to 12 inches long at least.

[Hardex]

I have an original TM250 muffler for sale but is missing the insert call me on 0417349457 if your interested

[SON]

RH 73 Unsilenced Stinger is 195mm 19mm ID

[albrid-3]

This is my Tm 250 L, original pipe.

[bazza]

just buy the beaten up RH one on e/bay.....only $ 3K

[TM BILL]

you need something 10 to 12 inches long at least.

Joan your bragging again 

[Lozza]

Thanks guys.
I would like to tune it for mid/high, as I would assume that is what stock porting will allow.  after the stinger I have a short 5 1/4 inch long muffler that has a ID that is larger than the ID of the stinger.  Everything else is stock except for 34mm VM and foam uni filter.

Tuned length of the pipe is what the engine responds to the stinger length is more or less irrelevant. Both for perfomance and noise, diameter has the biggest effect.