questions about polini and ct manifold/carb install

[2slow2go]

I am installing a polini contesta bbk, ct manifold, oil plug, throttle cable, 270mm shock and 21mm oko this sunday and I have a couple of questions/clarifications before I start.

Current setup

feel free to ignore this just wanted give background

49mm nikasil
9:1 gears
Keli variator
Keli clutch
v8 exhaust
stock carb (105 main) pilot is drilled out a little

My questions

Is there something I want to remove on the reads of the ct manifold? I thought I remember reading something about it a while ago but I cant find it now?

pistons rings are the same? obviously the beveled edge goes up
lock-tight the ct-mainifold? I have read about them coming loose
does the metal polini base gasket leak? should I go with a paper oem? obviously get the mating surfaces super clean
torque everything to oem specs?
does 118/45 seem like a good place to start with a 21mm oko
I dont have the spanner wrench to adjust the shock any tricks to do this?
32:1 the standard for BBK? what oil do people prefer I am running honda 2 stroke oil
What spark plug do people prefer? I am running stock BPR6HS
What temps should I be worried about ( I use a trailtech sensor is under a HEADBOLT)

Any other advise or word of wisdom?...... feel free to enlighten me.

I will wash everything down and and chamfer the ports

I will do a 3-5 heat cycles and ride it easy for the first 100-200 miles.

The goal of this is for scooter to be practical I want to be able to hit 50-55mph at wot and be able to cruise at 40-45mph and still have good acceleration

Thanks
2slow

[kingearwig]

Well I can't wait to hear the answers to some of these questions myself... But about the oil. I use penzoil marine injector oil. I get it in the gallon jug from autozone. I mix mine to 31:1... put 4 ounces in a gallon container and fill to gallon mark with gas. But during break in I add an extra ounce per gallon.

[maddog]

never use the penzoil marine oil it will blow your engine.

[LMH]

+1 on never use marine 2 stroke on an air cooled engine. Marine engines have water constantly running through them.

[LMH]

You won't have any issue cruising and meeting those speeds with that set up. I use a light coat of copper sealant on my metal gaskets but that's just me. I would run a br8hs plug or a 9. On the ct I cut the petal stops off but it may deteriorate your reeds quicker as they will rub the sides and the case I think on one side. But it will maximize flow. I would do some port work on the ct also, a lot of casting left over and bad angles on the top half. Not much experience with the 21mm but I might try a 120 main or 122, 45 pilot sounds good maybe a bit much for a 21 but I don't know. It's better to start rich.
Sounds like a fun ride!

[2slow2go]

^^^ I cleaned up the Ct manifold on the inside with a dermal before i installed it. The 45 was a little too much, just fired it up today and put a 42 in it I couldn't keep it running with a 45 unless I had the idle speed adjusted all the way in, seems to idle alot better about 1 turn out with a 42 in it.

It seems to be running pretty good still haven't taken it for a run yet been a doing heat cycles but it idles pretty good every minute or so the rpms drop and it "shakes/stumbles" and picks back up and idles fine. I am currently running a BPR6HS any reason why I should go with the 8?

[LMH]

Heat on the long stretches, during the winter if you ride you can use one of them 6s. It really needs a cooler plug when you run a big bore kit, or even stock if you're wot all the time.

[paulpauly7]

you dont want it to idle while doing heat cycles it needs to be just up from idle

[2slow2go]

To late to do the heat cycles right. I had my idle up and the temps got to around 170-180. Just got my first 50 miles on it. I ran a couple wot runs after the first 30 miles. It will hit 50 mph wavent done any long wot runs maybe 1/8 of a mile. goes from 40-48 fast then slowly climbs My temps seem good usually around 240-260 with the cht under a head bolt.

I started with a 118 main and dropped to a 115 and decided to just stick with the 118 for now I didn't notice a change accept it bogs sometime when I accelerate with 118 but I feel safer with it. Probably could clean it up by adjusting the needle clip up but its pita with the oko

My problems are

when I hit bumps it wants to stall on me I am assuming this is a float level issue?...... cuts out picks back up it is very annoying

On my first wot run it cut out on me and I thought oh s*** it soft seized be once I let off the throttle it picked back up. my temp was about 270ish so i am thinking fuel issue maybe float level?

Also between 3/4 and wot there is no change. I usually ride under 1/2 throttle and cruise around 40 mph.

currently running 32:1 with honda 2 cycle. after about 20 miles I checked the plug and it is dark brown.

[Wheelman-111]

Greetings:

Float issue wouldn't cause instant stumbling hitting a bump. Look for a loose carb mount or dodgy electrical connection more likely.

[2slow2go]

^^^ I know the carb is nice and tight I will check the wiring. It wont be for a couple a weeks I am back at school and I left my moped at home for now.