The keep on has a different bore/stroke and does need some cut outs in the sleeve to prevent the rod is hitting the sleeve. With the bore/stroke difference I doubt the JP P/S set is also giving the right offset and timings for a Keep-on crankshaft/crankcase.

so with that being said can i use the p/s/r set #08569 in the R09 case just checking thanks for the help guys

Probably it will work but you will end up with a smaller capacity, somewhere 3.3~3.4cc

And still I can not say something about the offset of the ports and timings.

thanks

I have the same problem plugs keep dying very easily. What sirio plug do I need?

INSTATE OF 0.3 SHIM ON 16 %. SOME ADVICE GIVEN IS ADDING 0.1 SHIM ON IT TOTAL 0.4.

Indeed, some engines have a tight compression not giving any tolerance on a lean setting.

Also take a look at Merlin Glowplugs, very good and affordable. They can handle a lot.

Sirio 6 for a .12 and 16% nitro. Might need a 7 when you use more nitro.

Stick with Nova plugs. You'll damage the threads when you use other plugs. If you want a colder plug try a C7GTF or C8TGH. The C8TGH is a very tough plug and it should never blow in a .12.

if use C8TGH,would the performance effected?

The tunning window will be narrowed slightly but you can tune the engine slightly leaner.


Andy Liu "Flyin' Hawaiian"

The owner of ORCAN engines told me that plugs need to be fresh/new. If a plug is in the package for more than 6 months--the life and performance of the plug decreases a lot. He also told me that Nova changed their manufacturing for the better in early 2012. He is a big fan of the nova C7GTF plug for .12 engines.

Since getting fresh/new C7GTF plugs (for 4-5 months now), running in tropical (hot and humid) weather, I have had my best lap times, my plugs now last 2-3 times as long as they used to and there is no noticeable difference in power over the 6F.

I am a believer.

Sadly, it is hard to tell the manufacture date of plugs so buy from someone who you trust and who gets them as direct as possible from Nova.

leaner would it effect when reach the peak rpm and also the engine life?

do you mean the filament will oxidized if keep it too long

Will give you slightly more power overall. As long as the engine is properly tuned overall then engine's life will not be compromised.