ESE's works engine tuner

[pete376403]

http://www.2t-racelab.com/2012/02/kawasaki-x-09.html Neat looking, unique engine configuration but in the end not fast enough

[ken seeber]

Here’s a pic of a TM 100 cc reed kart engine with piston & cyl removed. Direct drive, air cooled and used for sprint kart racing.



Someone has put a lot of time into the bottom end, blending out the cases and, interestingly, radiussed the inside edge of the crank webs. Not sure if this might be of any benefit, but could/does offer the following:

1. Increases crank case volume
2. Lightens the crank and reduces its flywheel effect (2nd moment of mass). The opposite of what has been done elsewhere.
3. Reduced the Cd of gas flow into and out of the crank cavity, particularly as this is a vertical reed engine.
4. Perhaps improves the lateral flow out of the crank cavity towards the transfer entries
5. Adds remote volume, at the bottom of the case cavity, maybe making the transfer of this extra volume less accessible.

Anyone seen this and would it be advantageous in certain applications? I do know there are a shitload of other variables involved, that need to be taken into account. I also appreciate that there are no simple universal answers for 2 strokes.

[TZ350]

I'd still advise caution.

Thanks for the heads up.

[SwePatrick]

Another question:

Is there some way to remove nicasil without machining?

Rgds

[husaberg]

Another question:

Is there some way to remove nicasil without machining?

Rgds

I thought it gets stripped with nitric acid?
Yow ling has done it.

[wobbly]

Ken , here are some thoughts on the TM100 kart mods.
The crank radiusing probably has more positive effect on the intake Cd as alot of the flow from the vertical reed orientation is directed straight into that area.
In a 100cc kart engine , the reduction in inertia would have more positive effect on acceleration , than the negative effects of the in cycle speed variation reducing transfer STA , as its
easy to get sufficient areas with the low bmep produced.
This type of mod was done many years ago on many factory tuned 100cc reed engines I have seen.

[Flettner]

Ok, Im going to ask here, who has a set of late modle YZ 125 cases laying around? So I might measure them up. No asking questions, ok. You can have them back when Im finished.

[anglia4]

Stinger question:
Due to packaging and the location of my muffler (under seat) my stinger is ending up longer than desired.
Would it help keep things in order if I step it back up by a tube size or two after the designed stinger length?

[F5 Dave]

Research posts on nozels at baffle end and make the Stinger bigger.

[anglia4]

Thanks for the search direction

I’ve been reading this thread for a couple of weeks now but haven’t even cracked page 100 yet!

[TZ350]

.
nozzle site:https://www.kiwibiker.co.nz/forums/s...s-engine-tuner

Use the google "site:" search term to find what you need. Cut and paste the search line above to find the posts on the ESE thread that talk about stinger nozzles.

[husaberg]

.
nozzle site:https://www.kiwibiker.co.nz/forums/s...s-engine-tuner

Use the google "site:" search term to find what you need. Cut and paste the search line above to find the posts on the ESE thread that talk about stinger nozzles.

I posted these the other day in another thread.
https://www.kiwibiker.co.nz/forums/s...post1131099423

https://www.kiwibiker.co.nz/forums/s...post1129954861

https://www.kiwibiker.co.nz/forums/s...post1129955411

https://www.kiwibiker.co.nz/forums/s...post1130089030

https://www.kiwibiker.co.nz/forums/s...post1130209099

[edgefinder]

One thing I see in Ken's picture of the TM 100 is the big end bearing will be as cool and well lubricated as possible, not a weak link but ready for a hard life

[husaberg]

Just me?........I find that intake very organic in shape.

[wobbly]

Absolutely not just you.Anyway its not a tree its a bush.