Ok, hold your breath, everything on the Skyhawk 48cc is doing what it should. ............and legal tooI was wondering after new NGK plug, Wire, and Air Filter, should I go with a Expansion Chamber............
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49cc is going strong
- Thread starter geebt48cc
- Start date
Ok, hold your breath, everything on the Skyhawk 48cc is doing what it should. ............and legal tooI was wondering after new NGK plug, Wire, and Air Filter, should I go with a Expansion Chamber............
Molotov256
Member
Short answer: Yes
Long answer: The only 2 bolt on mods I've noticed any significant performance increase from are expansion exhausts and boost bottles. Boost bottles don't seem to help me go faster, but both of my HT motors run a whole lot smoother with them installed.
Smart answer: Get additional opinions from more experienced members.
Long answer: The only 2 bolt on mods I've noticed any significant performance increase from are expansion exhausts and boost bottles. Boost bottles don't seem to help me go faster, but both of my HT motors run a whole lot smoother with them installed.
Smart answer: Get additional opinions from more experienced members.
Al.Fisherman
Active Member
After installing my homemade (PVC) boost bottle we had to turn down the idle. I don't know if it is because of the bottle but we don't have any blow back through the carburetor. Was easier to start, I don't know about speed as I haven't had mine WOT for any length of time on a 0 grade. No personal experience with the EC, but from what others say it is the most noticeable mod as far as the engine goes.
http://www.motoredbikes.com/album.php?albumid=892
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AussieSteve
Active Member
Glad you got everything sorted out. My 2c worth - get an expansion chamber. Biggest single improvement to any 2-stroke engine's performance.
AussieSteve
Active Member
I think that the Sick Bike Parts chamber is about the best, from what I've read. (I have one here, not fitted yet.)
AussieSteve
Active Member
Not sure Glen. I have no experience with boost bottles. I've always looked on them as a bit of a novelty, but many guys swear by them.
Ron knows more than I do on that subject.
Ron knows more than I do on that subject.
I went with the SBP chamber, and I could feel a difference.
I made my own boost bottle out of a float that I had in the garage. Doing
some research before I made it, I found a site that said a boost bottle should
be within 3cc + or - of the cc's of the motor that it will be used on. Mine is
exactly 66cc. I know this by going to a pharmacy and buying for a needle less
syringe and filling it up with water after the hose was on the bottle.
Shorty
I made my own boost bottle out of a float that I had in the garage. Doing
some research before I made it, I found a site that said a boost bottle should
be within 3cc + or - of the cc's of the motor that it will be used on. Mine is
exactly 66cc. I know this by going to a pharmacy and buying for a needle less
syringe and filling it up with water after the hose was on the bottle.
Shorty
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Steve, more of me wants to think that novelty is a good description of the boost bottle thing? Guess it can't hurt?
No, I just think that it's a phycological tactic? Who knows?
Listen, took plug out after about 5/miles.......(light tan in color now) and very clean.
No, I just think that it's a phycological tactic? Who knows?
Listen, took plug out after about 5/miles.......(light tan in color now) and very clean.
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