I think this engine tunes easy and holds its tune well....But you can't fake it, you do need to know how to tune an engine properly , as the JL will definitely not tune itself..... However if you know the basics this engine isn't too hard to dial in, as well if you take the time to ask me I can guide you thru any tuning issues you may have.... Run the plugs and pipes I recomend and things will work really well....The engine will work excelent in a 8 2.0... it has smooth delivery and gobs of power and RPM...and with a carb insert and a proper tune it will get good mileage as well....

ok thank you. where can i buy the moded one

shoot maximo a pm

You will really like Neal's mill. I just can't get over the speed. Italian engines are great for sure, but this Taiwan engine will b-slap many Italians in terms of speed. It gets decent runtimes. Mine has over 1.5 gallons on it and there's no leaks. It's considerably faster than any engine I've lined up with...quite a shocker if you ask me.

I will be dropping some ceramic bearings in it at 2 gallons, and possibly a new conrod for good measure. This one's a real sleeper..other engines are getting all the attention, while it sits on the sidelines, but when it comes out to play, it plays to win.

The JL 21 I run is box stock...I'm not a pro level driver yet I am a very good sportsman racer that has moments of being able to drive at a pro level....just moments.lol!
This motor is very easy to tune...holds tune very well...has the absolutely best,most usable power band,from bottom to top that I've come across.
My P5 was about to give up and for the cost of a rebuild I got the JL 21. I have run some high dollar Italian engines in the past 5 yrs of gas racing and this motor is just more drivable than any other...I will be trying one of the Clockworks engines soon!

so witch pipe and glow plug should i use. and dont i have to get a flywheel and clutch.

JP-1 for Truggy, JP-3 for Buggy....best plug is Picco P6TH, or OFNA OFN51005 the stock flywheel should work fine !

would torco 30% work good becouse thats what i have been using.

Can I ask a question, how do you microlap a piston to the exact tolerance you need??? I have friend that is a Intel engineer and he said he has 2 million dollar machines that would have trouble.

Maybe microlap is wrong term then ?

And I would think machining to this tolerance would be very difficult and likely would have to be done in a temperature controlled environment.....I am not "machining" to goal size, but rather to desired fitment of piston to the sleeve.... in measurement I am removing about .0003" from an average piston give or take depending on brand... I will not get into the technique or tools that I use exactly, but it does work well, especially on engines that don't have very good fitment from factory.....

..whatever the term may be..it works and works well.

Hell Maximo....I dont know of a another term for it...but we know what it is and I understand how it works and when my money gets straight I will be purchasing a micro lapped JL 21 from you..and I done all this on a machine that cost less than 500.00!

where can i get the modded one that you dont have to break in

I believe Im running a P3 plug. The pipe Im running is a JP3. I run a steel flywheel on it. My ride is a Losi 8 2.0

PM Maximo.....