Honda Spree and Elite 50 Forums

So I have rebuilt my afo5e motor with oem 0.25 over with a couple of upgrades such as ct racing manifold,34mm koso carb and some 2k clutch springs removed the oil injector and running a 40:1/44:1 castor 927 mixture to premium gas. Im just curious what should be my operating temperature as its my daily commuter? Max was 40 mph on flat road

Can I down size jets?

I've heard this before, I guess the big carbs don't work. I've got a similar setup and I'm beating your speed, 41 on a flat w a stock carb w uohet, a pump plug, 32:1 random 2t oil (always changing oils, haven't found a favorite), malossi vario n clutch, and uni filter. I think I got 1500 clutch Springs but I wanna go 2k. I think the head temp gauge would be smart but I ain't got one either haha. I dont kno what temp is too high anyway haha.

And I think you got taller gears than me... I got an 86 aero 50

Wow a 34 carb is way too big! I've seen guys run it but on dirt bikes.

benji wrote:And I think you got taller gears than me... I got an 86 aero 50

The SE50 and NB50 both use the same gears 11:1 however if you have a
SE50 and the spedometer shows up to 45mph you have 10:1 gears(means you can go faster). On my spree my SE50 engine has a malossi Big Bore kit and with main jet supplied with bbk. also i have malossi cdi I'm easily past 45 and this with stock pipe and carb. I agree a 34mm carb will only guzzle your gas and throw off your Air/Fuel/Oil Ratio. Those size carbs are usually for ATV's and larger displacement dirtbikes

I think 34mm is actually the upgraded weber carb size for a toyota truck w a 4 cylinder btw. Your carb is big enough for a 4 cylinder w 2000cc!

Lol 34

Probably a bell mouth measurement ..I hope.