Honda Spree and Elite 50 Forums

i did it. got my gears in my scoot today and everything put back together.

went on my first test run and.... i bury my speedo in the flats. i will have time to get my gps tommrow and get more acurate results. with the 2k clutch grabbers i dont feel much low end problems. after about 5 mph it gets bananas.

so i have since dropped my rollers to 6gs after having them a mix of 7 and 6s. 6s keep me higher reved on the hills.
i am satisfied with its performance in the flats, but of course i am always wanting better acceleration and hill climbing ability.

i want to go for a big bore kit. can anyone recomend one that they would have a starting point as far as tuning with the stock carb and a 28mm pipe? like jetting and such.

my bore has 6 thousand on it and i think its tired...

aerorob wrote:so i have since dropped my rollers to 6gs after having them a mix of 7 and 6s. 6s keep me higher reved on the hills.
i am satisfied with its performance in the flats, but of course i am always wanting better acceleration and hill climbing ability.

i want to go for a big bore kit. can anyone recomend one that they would have a starting point as far as tuning with the stock carb and a 28mm pipe? like jetting and such.

my bore has 6 thousand on it and i think its tired...

Depends on how much cash you want to spend, Polini Corsa would be best bet (bolt on but pricey). Might as well go with a 24mm oko carb and a mani too.

im already getting pretty far into this scooter so what is a few hundred more

i am not sure if i need something like the corsa. the contessa promises to be a huge improvement over a 6k stock bore.with something like the contessa, i would run my stock carb. how do i get main jets that are THAT oversized and what size of main jet would be in the ballpark? i just want to go for reliable power. i have even thought of just getting a new piston and rings for my stock bore and seeing if that gives me that extra nudge of power.

You might as well just get everything and get it over with, i think you got the bug . I'd recommend having cylinder bored for next size over piston (i think it's .25mm over) and keep the stock carb. At least have cylinder checked. You might have to upjet, do plug chops.

some stuff to think about... im not sure where i could get a oversized piston, any suggestions? and would a typical machine shop be able to bore it?

does anyone know what steps to take to get your bore bored out to fit a stock oversized piston? i can order an oversized piston and rings form honda oem and i wanted to know if anyone has gotten their bores bored out?

so.. i finaly got my gps and i have a top speed of 51.8mph. woo! the speedo needle is perfectly flat. there was a time yesterday when the needle dissapeared so im pretty sure i have breached 52. i have a 88 main jet coming in this week, looked at my plug and decided it was a tad lean. and my brand new air filter element went in right before the speed test. i think the added fuel will give me a little more omph. and while i was hitting 51.8 it didnt seem to be reved super high, i might try annother roller swap to see what its doing. but with the 6s in there i can pull 40 up the same hill i stayed at 35 at yesterday, so im happy for now.

aerorob wrote:does anyone know what steps to take to get your bore bored out to fit a stock oversized piston? i can order an oversized piston and rings form honda oem and i wanted to know if anyone has gotten their bores bored out?

I'm sure a normal machine shop could do it, i had one done at local performance cycle shop.

Greetings:

JiangWayne had a set of jets up to 110 as recently as 2009. Be sure to measure them with an indexing drill bit however, as their nominal sizes did not match the numbers stamped on them. Harbor Freight has a $10 set of such bits that can serve. If you're feeling lucky, you can roll yer own with these bits.

is rolling your own jets what i think it is? putting a drill bit through the jet and rolling it to make the inner diameter of the jet larger? wow that seems pretty questionable of accuracy... any pointers? seems like it would be a good skill.

Greetings:

Just chuck the desired size in trusty Makita. Hold jet square and make 1 pass. Verify size with 1 size bigger bit.

so i am going to try an 88 jet instead of my 85. my plug read a little lighter than i thought i was reading. i removed one of the airbox mounting brackets so i can drop the float bowl and change the main jet without removing the carb. i have yet to drop the bowl this way,

so question, wheelman i got this idea from you, does the float bowl clear now with that airbox mounting bracket off?
thanks!

Greetings:

Yes with the airbox and that pesky bracket gone dropping the 2-screw stock bowl required only a short screwdriver.

If you're running over 50 on 50cc, your bore isn't that tired. Contessa is a good choice. I have been pleasantly surprised by my Nikasil 78.

so on the exhaust tuning side of things i have installed my 88 jet (took 2 minutes thanks wheelman) and have noticed signifacant gains over my 85 jet. mainly low and midrange power have increased. i have moved to the other side of town and dont have a stretch of road close to my house that has a speed limit of over 30, so its difficult to test top speed. with my 85 jet i was annoyed by a pop pop pop sound durring decel from any speed, and now it only does the pop thing till about 35 while im decellerating, and after that it is smooth all the way down till idle. seems to run all around better now so i am impressed. so with stock airbox/carb/diplacement with this pipe, you will difinately want a higher jet like a 88.