SA50 upgrades

[Wheelman-111]

Greetings:

Stock clutch is as good as any except for spring tuning hassle. They are all too small for BBK power.

[lilredspree]

Alright. 24mm carby and 8.4's with the bbk.

By spring hassle do you mean its hard to change the springs?

Are you sayin the clutch is too small or the stock springs are too small?

[odinxxix]

i believe he is talking about the springs being to small

[lilredspree]

chopchop*123 is selling a 50mm BBK with gearing. http://cgi.ebay.com/ebaymotors/Honda-SA ... _500wt_956

I asked and he said...

i have 2 ratios. 17*41 and 15*42

i really dont know. I go by teeth count. the 15's will get you to
45-50mph and the 17's are taller and will get you about 50-
60mph. hope that helps.


what do you guys think the ratio comes out to?
i'm not sure of the other factors involved with the drive train to calculate the final drive ratio

[Wheelman-111]

Greetings:

Sorry I shouldn't try to type on the BlackBerry from the road. I meant that the stock clutch and all the aftermarket ones struggle with BBK power because they are too small overall. They need fancy vented bells, open rear belt covers and copious ventilation because of it. They were designed to absorb 3-5 HP, and we're feeding a lot more. Repeated starts are torture. The Aftermarket clutches may in some cases use better design and materials, but not enough of it. Except for its adjustment hassle factor - dismantle to change springs - Honda's clutch is about as good as any I've tried.

There's a whole thread in Technical Documents that will help you (and Taz) determine the net from your primary gearset. Look for "Tooth Tally".

[eliteguy50]

i have 2 ratios. 17*41 and 15*42

roughly 8.35 and 9.7 according to the chart or 8.4 and 9.8 according to 808BMW http://www.hondaspree.net/phpBB3/viewto ... ooth+tally

[lilredspree]

Thanks for the clarification wheelman.

As for the gearing thanks for the link and thanks eliteguy for figuring that out.

[veedubh20]

how much do you weigh?

[lilredspree]

I weigh 160 and the motor is being dropped into my spree

[lilredspree]

so i'll be gettin my motor tomorrow with:

taz's 50mm bbk with 8.4's
hand made V8 pipe
24mm carb kit w/mani
keli variator

startin out my build with these.
its going to be a slow one with school right now, but once spring break rolls around I should be gettin a bunch of work done on this thing and hopefully installed on the spree

[lilredspree]

Its been quite a while for this, but I'm finally coming down to the end! Got all my parts coming back from powdercoat this week. Couple last questions for all of you:

1. With the 82cc bbk and 8.4's i want to run 1500 center spring (i have 1000, 1500, and 2000) and 2000 clutch springs (have 1000, 1500, and 2000 also). I feel like those are a good start for a street setup. Where do you guys think I should start with for variator weights? I have a whole set of those too.

2. What spark plugs should I pick up?

BTW this whole engine setup is going in my spree.

[Wheelman-111]

Greetings:

Consider 35-40 grams total load in the variator for break-in. The intention is to keep the RPM down a bit getting started. Keep an eye on the tach and try not to exceed 8500 or so until you've drained a tank or two.

I'd start with a B8HS as the engine will be kept cool early on - break-in again. Maybe consider a B9HS if it's hot and you ride WOT a lot.

[lilredspree]

Thanks wheelman. I'll keep ya'll posted. I'll start a build thread once all is back from powder coating!

[bakaracer]

make sure you get extra head gaskets. your going to need it since your going to use pump gas in it. the compression ratio will be to high for pump gas so adding the extra head gasket will lower that ratio down. if not your going to end up with a hole in the piston or seize the * out of the bore.

[lilredspree]

Baka, if I dont use pump gas and go buy some racing fuel, what should I run?