Question regarding 4-strokes and frame size.

rbrtlndhl · #1 02-11-2010, 09:23 PM

What size frame will I need to center-mount a Hua Sheng 4stroke with a 4g belt gearbox? I do not own beach-cruiser-style frames, only the standard triangle style. Specifically, does anyone have a length minimum on all three tubes? Please be sure to mention whether measurements are taken from the inside of the frame triangle or the outside. I have a hard tail Diamondback frame that's about 14 5/8 inches long on the inside of the seat post bar (sorry for lack of other measurements, that I would like to use if possible. it is a "Response Sport", 3 to 5 years old. I can make minor adjustments if need be, but am not interested in welding/cutting. I am aware that I may need over-sized tubing modifications. This is not my only option by far. Thoughts?

tyrslider · #2 02-12-2010, 04:26 PM

Most 4 strokes will fit a 19" frame and even smaller if you have fabricating skills. You'll likely run into problems w/ that frame.

rbrtlndhl · #3 02-13-2010, 11:42 PM

ok thanks for the info. What about the standard sized occ chopper? i Can weld custom mounts if the engine would physically fit inside?

tyrslider · #4 02-14-2010, 12:03 AM

Your gonna need 10" of height w/ a horiz base of 6" for most i.e. move up from your bb till you have 6" between your down tube and your seat tube andx if you still have 10 or 11" to your top tube your golden!

Ghost0 · #5 02-14-2010, 11:10 AM

Here is a pretty simple method for measuring.

tyrslider · #6 02-14-2010, 12:02 PM

I stand corrected! That was from memory (been a little while since I installed an HS), forgot you need some space behind them to accommodate the air filter. Duh

rbrtlndhl · #7 02-14-2010, 06:46 PM

Hey, thanks, ghost and tyreslider, this was VERY informative. I'm so glad to be part of this forum. Hey ghost, no worries about THAT frame being stolen! You could spot it from 2 miles away!

**Dan** · #8 02-14-2010, 09:20 PM

Quote:

Originally Posted by Ghost0

Here is a pretty simple method for measuring.

That is awesome Ghost0, ty.

rbrtlndhl · #9 02-16-2010, 09:15 AM

Awesome! I just found the perfect frame (in my eyes, anyway.) It is an older (looks like 80's) Giant Chinook. Got it free from the local landfill. Everything functions perfectly, with the exception of a missing left crank arm. WWWOOOOO-HHHOOOO!!!!!! And it's big. I mean real nice and big. And it's steel. And the tubing is regular-sized! YEAH! 12- speed madness, y'all! It even came with big, bad, fat tires on it!

**Dan** · #10 02-16-2010, 04:23 PM

Gosta love dat! A steal at twice the price. Fat tires make for a much better ride. Post lots of pics

Very cool. Steel to boot. score