ESE's works engine tuner

[TZ350]

More of Alex's adventures at 2Stroke Tuning.

[SwePatrick]

I noticed a thing, everytime you post new video from Norway, the thread dies a little.
time to wake it up again.

How would you guys deisgn a combustionchamber for an 85cc motocross with small mods like v-force and pro circuit pipe?

[F5 Dave]

By not using a a ProCircus pipe.

[SwePatrick]

That´s what i try to say to the friend, but he is a cataloguetuner.

[F5 Dave]

Well he'll be wanting a Dingleberry mod carburetor, a moleskin seat cover, Eeljuice chainlube, and of course a faktoryEFX decalkit.

[I may have made some of these things up]

[Pursang]

How would you guys design a combustion chamber for an 85cc motocross with small mods like v-force and pro circuit pipe?

1: Take the stock factory head, set the squish clearance, adjust the CR for low end, mid range or top end power.

2: Dress off any casting flash, vapour blast it, CNC mill in your initials and the words "Racing" or "Factory" or both.

3: Charge as much money as the client can bear.

Cheers, Daryl

[Grumph]

1: Take the stock factory head, set the squish clearance, adjust the CR for low end, mid range or top end power.

2: Dress off any casting flash, vapour blast it, CNC mill in your initials and the words "Racing" or "Factory" or both.

3: Charge as much money as the client can bear.

Cheers, Daryl

Substitute "Client's father " and you're onto it.

[F5 Dave]

1: Take the stock factory head, set the squish clearance, adjust the CR for low end, mid range or top end power.

2: Dress off any casting flash, vapour blast it, CNC mill in your initials and the words "Racing" or "Factory" or both.

3: Charge as much money as the client can bear.

Cheers, Daryl

I'm strangely tempted.

Where do I send my money ?

[koenich]

If you add "revs to the moon" I'll send my engine tomorrow!

Gold

[Muhr]

Hi, does anyone have Dyno graphs on Tm Mx 125 and or Ktm sx 125 2017 and newer. Would help a lot! Working on an engine for a friend and the results are deplorable. Have tried lots of different things but it absolutely does not want to breathe over 11k.

[Tim Ey]

Hi, does anyone have Dyno graphs on Tm Mx 125 and or Ktm sx 125 2017 and newer. Would help a lot! Working on an engine for a friend and the results are deplorable. Have tried lots of different things but it absolutely does not want to breathe over 11k.

125SX from 2016 (Model 2017)

Before and after tuning. I have written more about it roughly a year ago.

Have you checked the Ignition? The 2017 125 SX is advancing to the moon after the retardation for overrev. I would consider it poor mans rev limiter...

[Muhr]

125SX from 2016 (Model 2017)

Before and after tuning. I have written more about it roughly a year ago.

Have you checked the Ignition? The 2017 125 SX is advancing to the moon after the retardation for overrev. I would consider it poor mans rev limiter...

Thanks Tim!
In my case it is a TM 125 but the competition will include sx engines.
Then I know where the bar is. The TM cylinder has a port map similar to rs125 from the 90s

[jonny quest]

Inertia dyno testing, motor shows horsepower gains on the bottom end lower mid range.

On the track the dyno gains aren't felt by the rider.

Why is this?

[SwePatrick]

He probably never uses the powergained area.

[jonny quest]

He probably never uses the powergained area.

Rider complains it doesn't have enough bottom end power, compared to what he had before. But it clearly shows a decent gain on dyno