Got The Holeshot
Arm chair racerJust too addicted
I bought a 310 kit from ESR a while ago and finally got around to bolting it on last weekend. The kit I got was ported for TT Racing. Below are the dyno results, 48.10 HP and 31.20 lbft of torque. This is using stock carb and airbox assembly with the lid removed. My exhaust is a CRF sectional. I was very impressed with the numbers and figured others would be interested in the results.
Power User
Got the holeshot
I dont know too much about dyno results for 2 strokes but isn't it weird that your tq and hp both dipped around 5500 and then came back up?
At The Back Of The Pack
Arm chair racerAt the back of the pack
this is nice too know. wish i could see the numbers with a 38 a/s carb and an airbox delete. the drop off in the middle of the curve tho is kind of weird supposed to be an all purpose port job basically so you'd think the middle of the curve would be steady from low to high. did you do any tweaking with the needle to see if it would take the drop off out or did you just do a few simple pulls.
Power User
The day begins with 3WW
Tire spin will cause that dip.
'86 ATC 250R, Build Thread http://www.3wheelerworld.com/showthr...highlight=250r
'86 "Factory Tri racing" Tri-Z http://www.3wheelerworld.com/showthr...b-Top-Tank-ect
Pile of Tecate Parts
My Feedback Thread: http://www.3wheelerworld.com/showthr...edback-for-bkm
Got The Holeshot
Arm chair racerJust too addicted
The dip was due not having the throttle valve and needle jet dialed in perfectly. We were able to tune that out.
Power User
The day begins with 3WW
I'm curious as to what mine will put down. ESR Pro-x cylinder 310(295) TRX 9 porting, PT Hi-Rev pipe, Race gas dome, rad valve, 39 pwk, no lid on the air box. probably pretty close to yours.
'86 ATC 250R, Build Thread http://www.3wheelerworld.com/showthr...highlight=250r
'86 "Factory Tri racing" Tri-Z http://www.3wheelerworld.com/showthr...b-Top-Tank-ect
Pile of Tecate Parts
My Feedback Thread: http://www.3wheelerworld.com/showthr...edback-for-bkm
At The Back Of The Pack
Arm chair racerAt the back of the pack
nice! that should be really quick. I bet it sounds great. I have been trying to call esr, I just get put on hold then nothing. I tried to email them no replies. I really want to buy a pipe. If I order from them will I get it?
I'm your dingleberry
The day begins with 3WW
Those are some pretty good numbers!
Makes me wonder what mine would do as well.. ESR350, ESR reedblock, 38mm AS, ESR ATC5 pipe with silencer, TRX9 porting with race gas dome....
I need to find someone in my area with a dyno..
Trikes:
'85 ATC 350R
'85 ATC 250R
'86 ATC 350X
'85 ATC 350X
'84 ATC 200ES Big Red
'84 ATC 125M
'85 ATC 110
'85 ATC 70/110
If you have bought from me or sold to me, please leave me feedback here>>> http://www.3wheelerworld.com/showthr...+RIDE-RED+250r
At The Back Of The Pack
Arm chair racerAt the back of the pack
Is that the non-power valve kit then?
And a red 2000 silverado
Got The Holeshot
Arm chair racerJust too addicted
Yep this is the non-power valve kit
Power User
Teaching quads a lesson
Thats real impressive!
08 Outlaw 525s
07 CRF70
04 Harley FLHRCI
04 TRX90
03 XR650R
03 400EX- XR650R engine
02 XR100R
01 Banshee
00 XR50R
00 XR70R
99 PW50
99 JR50
96,95 Sportsman 400
95 Xplorer 400
94 Indy XLT
87 Trail Boss
86,86,86,86,86 Scrambler
86 TRX70 x2
85 ATC350X
85,84 ATC250R
85 Red Tecate
85 LT50 x2
84 XR500R
84,84,84,84,83,82,80,79 ATC70
82,79 XL500R
83 ALT50
79,78,77,77,76 XT/TT500
76,75,74 XL70
72,71,71,71 SL70
72 Harley FX
72,71,70,70,70,70,70 CT70H
72 SL100
70,69 Z50
New to the board
Arm chair racerNew to the board
I recently spoke with tom at ESR. Have no worries, they are in business. I know of some people who have recently made a purchase and the transaction was perfect!Originally Posted by ONEBAD350X
I cant wait to see it Matt. that is an awesome bike you have built! 48 hp to the rear wheels has got to be a heck of a ride!!!
At The Back Of The Pack
Arm chair racerFirst time rider
It would be interesting to see the dyno readings for a stock fresh 250R. I know that they are "supposed" to be 38hp, but an actual graph like that would be nice. Of course, I assume that the factory claimed 38hp is at the crank, whereas your dyno reading is at the rear wheels, hence the desire to see rear wheel numbers for a stocker. How much is lost between the crank and the rear wheels, I wonder.
Mine ('85 250R) is on 3rd bore (I think, I'd have to go check), open air box, K&N filter, Mikuni 38 flatslide, Boyeson reeds, 3/8" reed spacer, Trinity stage III porting, Weisco piston, Bill's pipe, Answer Roost Boost. I've always "guessed" that I'm somewhere around 45hp, but that may just be wishful thinking, based on the factory's claimed stock hp of 38. And again, comparing apples to apples means that my 45hp guess would also be at the crank, not the wheels.
Power User
Roostin Away
Jerry Hall at Halls Precision had the unique opportunity to dyno a showroom stock 89 TRX250R with 20hrs of ride time. All original down to the pipe, muffler, airbox lid, motor never had a wrench on it, ect.just like it rolled off the Honda dealership. It made 38hp to the rear wheels. Even used the factory 20:1 oil ratio for testing purity.
4 Strokes are NOT the wave of the future!
Just Too Addicted
Arm chair racerJust too addicted
Xrider those numbers are a few numbers too low for me.
I recently rebuilt my 88 Trx 250r with a stock cylinder and was dyno tuned by Kenz cycle tech at 51.2hp with a stock cylinder. My 88 Trx 250r has a mild ported cylinder, 1985 ATC 250r head and cylinder gasket, 38mm air srtryker carb, carbon tech ht reeds, ESR trx9 pipe, and no air box lid.
I'm sure when you buy the 38mm air stryker carb your number will go up and will be your best bang for your buck or you will not be disappointed when you buy carb. Good luck with it and enjoy riding her.
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