Mad Scientist Lab test - Boost Bottle

Easy
I don't have a good answer for you I tried a combo of different sizes and lengths dia. What I found is what I posted. The only thing I didn't do was the diaphragm bottle and I think that might have been different. I pulled my bottle off today and plugged the hole with an aviation 1/8" pipe plug( anodized aluminum) I also smoothed out the inside of the manifold where the plug stuck out in the bore. I would recommend you try for a 69 to 70cc including the hose as that seemed the best. I did find that if the bottle was up over the head( mine were made out of steel) I never collected liquid in the bottle. I also found that it smoothed out the low rpm what I did not like is it takes a long time for the idle to stabilize after riding and coming to a stop. To me the bottle was not worth the trouble, but was fun to experiment with.
I didn't answer your question very well but I tried to.
norman

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Thanks Norm,
When I bought the Boost Bottle, the instructions said to have it higher than the carb.

Easy
Something you might try and that is drill out the barbed fitting for a larger inside dia. both ends but you will need to take them off the bike. You do not want the shaving in the engine. Your line looks close to the same size as mine..I drilled out the barbed fitting. This might give you some hidden extra, or it will screw it up, but you can get new fitting as they aren't expensive. I drilled out the inside of the barbed fitting to .189 or a #12 drill you can try and go larger if you want to I settled on that dia.

This is the bottle I rermoved off my 70cc its at 68cc for bottle and close to 69.8 cc with fittings


This is a 69cc bottle on my so called 80cc

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norms-iron-works.tripod.com
motor assisted bicycle engine headlights that work off of your white power wire. check it out

I just found this thread and have been meaning to ask you guys about these things. How does the boost bottle work? Do you need a tuned pipe for it to do any good? Where can they be found? Will one work with a 48cc? Sorry for all the questions, as I've said, I've been out of the loop for a year or so and the technology has deffinatly gotten alot better...Kelly

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i have one i got from Boost Bottle Industries but it has been to darn cold to put it on and try it out. i will let you know as soon as i do.

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There are no magic speed products or mechanics that come in a bottle, can, or other....except nitrous, and that's not for these engines.

I've played with a wet nitrous kit on my 2 cycle motors and its scary! I found that after you depress the button...expect that motor to scream for another 3-5 seconds. Plus I've blown up a few motors and reed cages.

my understanding is the boost bottle helps on low end which if it does great. if not won't be the first nickel i waisted

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THe boost bottle works great on my 70cc motor. You'll need to adjust the idle screw after installing the bottle, but it does smooth out the low end and increase low end torque....in my case at least. I highly recommend them.

FYI, the volume of the boost bottle should match the displacement of your motor. They make 48cc and 70cc bottles for the Chinese kits.

This link explains how the boost bottle works

Boost_bottle_information_page