45u Active Member Local time 5:09 PM Joined Feb 18, 2016 Messages 786 Location Georgia USA May 3, 2016 #1 Does anyone make hop up parts for the 4 cycle motors? My third build is going to be a 4 cycle. Thanks Jeff
Does anyone make hop up parts for the 4 cycle motors? My third build is going to be a 4 cycle. Thanks Jeff
R rhenning New Member Local time 4:09 PM Joined Jan 30, 2010 Messages 2 May 7, 2016 #2 Which 4 cycle?? There are a lot of different 4 strokes out there. Roger
45u Active Member Local time 5:09 PM Joined Feb 18, 2016 Messages 786 Location Georgia USA May 7, 2016 #3 rhenning said: Which 4 cycle?? There are a lot of different 4 strokes out there. Roger Click to expand... 49cc Gurbee https://www.motorizedbicycle.com/bi...lt-drive-complete-gas-powered-engine-kit.html
rhenning said: Which 4 cycle?? There are a lot of different 4 strokes out there. Roger Click to expand... 49cc Gurbee https://www.motorizedbicycle.com/bi...lt-drive-complete-gas-powered-engine-kit.html
HeadSmess Well-Known Member Local time 7:09 AM Joined May 17, 2010 Messages 3,048 May 7, 2016 #4 http://www.ebay.com.au/itm/GT15-T15...239999?hash=item280cd900ff:g:8tkAAOSwKrhVbRrL swear i have seen smaller ones... not much. bit of port work, can you reprofile cams, given that they use a single lobe cam? um... the 142f or whatever it is, isnt easily modified...looks like a huasheng, at least. cant raise compression ratios, cant do this, cant do that... EFI... modified exhaust... they go pretty good stock anyway. much more torque than the 2 stroke kits. better off sticking with a twostroke and using a chainsaw engine... Links to eBay may include affiliate code. If you click on an eBay link and make a purchase, this forum may earn a small commission.
http://www.ebay.com.au/itm/GT15-T15...239999?hash=item280cd900ff:g:8tkAAOSwKrhVbRrL swear i have seen smaller ones... not much. bit of port work, can you reprofile cams, given that they use a single lobe cam? um... the 142f or whatever it is, isnt easily modified...looks like a huasheng, at least. cant raise compression ratios, cant do this, cant do that... EFI... modified exhaust... they go pretty good stock anyway. much more torque than the 2 stroke kits. better off sticking with a twostroke and using a chainsaw engine...
Frankfort MB's Well-Known Member Local time 5:09 PM Joined Apr 3, 2016 Messages 1,010 Location Frankfort Kentucky May 8, 2016 #5 Could you do some port work on the intake valves and exhaust valves?
C chainmaker Member Local time 5:09 PM Joined Nov 9, 2009 Messages 469 Location Plymouth Ma May 17, 2016 #6 Get a HF79 at least you can do some basic stuff to it, it's so small could easily pass as 49cc
Nanonevol Member Local time 5:09 PM Joined Oct 1, 2015 Messages 166 Location Medway Massachusetts May 17, 2016 #7 Here's a company with fuel injection and turbos for small engines: http://www.ecotrons.com/products/small_engine_fuel_injection_kit/
Here's a company with fuel injection and turbos for small engines: http://www.ecotrons.com/products/small_engine_fuel_injection_kit/
Frankfort MB's Well-Known Member Local time 5:09 PM Joined Apr 3, 2016 Messages 1,010 Location Frankfort Kentucky May 17, 2016 #8 Awe how cute
45u Active Member Local time 5:09 PM Joined Feb 18, 2016 Messages 786 Location Georgia USA May 18, 2016 #9 So what most are saying that the 4 cycle does not have anywhere near the up grades the 2 cycles do. Thanks Jeff
So what most are saying that the 4 cycle does not have anywhere near the up grades the 2 cycles do. Thanks Jeff
O Old Bob Member Local time 5:09 PM Joined Dec 28, 2008 Messages 472 May 18, 2016 #10 None to speak of, small market and not enough sales to support it. They wouldn't pay $35 for a high output cam for a Honda GX series engine and there were liability issues. So it was dropped.
None to speak of, small market and not enough sales to support it. They wouldn't pay $35 for a high output cam for a Honda GX series engine and there were liability issues. So it was dropped.