The 171fmm engines must not all be created equal then. Maybe that HiBird does'nt have a Lifan engine but a clone.

I am starting to think those emissions badges are leaving a little to be desired with accuracy on any of the China ATVs.

Think you guys have anyway of taking some pictures and posting them on here of your V4S engine case that you split. If not, no biggie. How is that project going? You mentioned that it was a nightmare, just wondering about your progress on it. Man if you get that back together and running it should be a beast.

 

I just got it back to gether we got to rejet it now

 

great news sgt tanner,hope all goes well.any chance on getting it on video? and also what was the solution to the exhaust melting the rear plastics? did the standard can go back on or have you heat proofed the plastics for the FMF can?
i have seen a heat reflective sticky pad you can cut and mould to shape.comes in sheets 12" X 8".

 

I put the stok pipe back on i just took out the packing i am trying to barrow my brothers video camra we are going out to ride had to pull in a HI BIRD about 4 miles it stoped runing that thange sucks

 

Man my father-inlaw has a Hibird 200cc, I hope it doesn't just quit like that up in the mountain trails. I think I will pack a tow strap and a pair of jumper cables along with some tools this summer just in case.

 

Slydog, we are all finding out how inaccurate those emission badges are. Some of the 2007 and 2008 Vbike V4S ATVs badges state 197cc on a 250. Of course we now know the measured bore and stroke of that engine, thanks to SSGT Tanner, actual displacement 241cc.

I don't trust those "stinking badges".

 

seems these badges are just to pretend they comply to something....fat lot of good that is if its not even for the right bike to the badge thats fitted to it

 

If you ever go to sell an ATV with an emission badge that says 197cc, try convincing your potential buyer that its a 250. Not that I have any plans of selling, I really like the 250 V4S.

 

all the work i have don is well worth it tops out at 67 mph the bike runs out of gears still has power

 

well played sgt tanner....not sure i'd wanna hit nearly 70mph on a vbike though.how about this video then of it in action