timing and jetting suggestions.....please

[bubbasbanshee355]

well after ten years of beating on it, I decided it was time to treat my 1998 banshee to a make over and engine overhaul! Did i mention the head gasket leak and piston melt down?

 

Mod list pre meltdown:

 

- .060 wiseco pro-lites

- Stock Stroke crank (started to come apart and bearings got warm from leak)

- FMF fatty's w/ power core 2's

- stock carbs Dyno jet kit (370 main, stock pilot?? help???)

- 3/8 reed spacers stock cages and reeds

- Boost bottle

- Pro flo adapter w/ K&N filter, lid removed

- Hinson clutch basket

- Pro Design adj. timing plate set at +7*

 

Mod list when put back together:

 

- .080 over wiseco stroker pistons

- 4 mm 115mm long rod stroker crank

- 4 mm spacer plate

- home port job(cleaned up casting flaws added boost ports no port hieght changes)

- FMF fatty's w/ power core 2's

- Duncan racing PT powerhead 18cc domes (1490 ft above sea level)

- Stock carbs( trying to find a set of 35mm pwks)

- dyno jet kit 370 main, Pilot ???? (again 1490ft above sea level)

- Pro flo w/ K&N filter(dual clamp on filters if I get 35mm's)

- Hinson basket

- Pro Design adj. timing plate set at ????

- 200 watt ricky stator

 

My main concern is my compression with 18cc domes and what fuel to run and what to set the timing at. I run mostly woods and some wide open fields. not worried about bottom end power cuz i have only ever owned two strokes and can deal in the woods. I want the most power all across the board. i came here because i have read through these fourms and i am sure i came to the right place. thanks guys

[GrMeyer]

I would go to around +4 timing. The Fatty are not a top end pipe so you will gain from the timing. The builders on here are going to want to know your combustion squash. As for Jetting... I dont have a clue on a 4mil bike like yours. Also, are you using the stock intake boots to the box with a K&N in there?

[bubbasbanshee355]

I would go to around +4 timing. The Fatty are not a top end pipe so you will gain from the timing. The builders on here are going to want to know your combustion squash. As for Jetting... I dont have a clue on a 4mil bike like yours. Also, are you using the stock intake boots to the box with a K&N in there?

 

 

I know the fatty's arent a top end pipe but i got them used for under $250 and i stay 3-4 quad lengths a head of the modded raptor 660 i ride with and it doesnt bog on the top just keeps pulling. yes I am using the stock intake boots right now but would like to jump up to twin clamp ons when i get bigger carbs.