12-11-2008, 04:30 PM | #1 |
Join Date: Jul 2008
Posts: 18
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163 FML cylinder head
Anyone know where I could purchase a new
or used (no cracks!) Lifan 163 FML head? Looking to do a full port job, and still want to keep my low mile stocker as a backup. |
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12-14-2008, 02:38 AM | #2 |
Join Date: Jun 2008
Location: Charleston, SC
Posts: 351
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You can buy a whole engine for under $400 last I checked.
I don't think you will find a seperate head though. Just cause of the small useful life of a china bike.
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12-14-2008, 09:24 PM | #3 |
Join Date: Jul 2008
Posts: 18
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Many thanks for the reply. What sort of "high wear parts"
should I expect from the 200? I'm also running a custom stepped header (1" to 1.250" to 1.50" collector) and noticed your jetting. I appreciate the openness to share performance insites. Was wanting to flow around 80-85 percent exhaust to intake ratio, and feel there is a lot of potential in the little engine. Thanks again for the reply. By the way, what combinations of piston and connecting rod options are available for it? Flycutting, decking the piston, re-ground cam, etc. isn't a problem. |
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12-15-2008, 03:46 AM | #4 |
Join Date: Jun 2008
Location: Charleston, SC
Posts: 351
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Everything on these bikes like to go pretty fast, but I have heard of more electrical problems than any other thing. Mainly the battery and charging systems.
As far as performance there is not much you can do. I guess high modification isn't a problem, but I don't know if the little motor could take it. Custom from a machine shop is going to be your best bet. You could mabye find a piston, cam, or rods at a dealer ship, but they usualy don't do "parts in a bin" any more so you'd have to know a motor thats simmilar.
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12-15-2008, 09:09 AM | #5 |
Join Date: May 2007
Location: Altamont, Kansas
Posts: 15,103
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You might want to post in the wanted section and also give Bruce a call at EJcycles. 330-274-0098 He may have one.
Allen
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12-15-2008, 08:26 PM | #6 |
Join Date: Jul 2008
Posts: 18
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Many thanks for the replies. Glad I found the forum,
it's proved to be very informative. Might do some research into Honda engines to find a close match to piston diameter, stroke, rod length, cam timing, etc. Good forum ya'll have. Clean and lots of info. |
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12-16-2008, 04:40 PM | #7 |
Join Date: May 2007
Location: Altamont, Kansas
Posts: 15,103
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For the honda look at the xl185 and the atc engines. Also the crf230 I think. One of them might be close.
Allen
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12-16-2008, 09:17 PM | #8 |
Join Date: Mar 2008
Location: West Virginia
Posts: 629
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New Cylinder Heads
This may be what you're after. Says from a GY6, but being sold as a "150".
http://www.chineseatvpart.com/cylind...50cc-atv/p221/ Any Honda CG head will probably do as well.
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Wayne Wildfire WF300-SP |
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12-17-2008, 05:32 AM | #9 | |
Re: New Cylinder Heads
Quote:
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12-17-2008, 12:22 PM | #10 |
Join Date: Mar 2008
Location: West Virginia
Posts: 629
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This is what an OHC should look like:
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12-17-2008, 12:27 PM | #11 |
Join Date: May 2007
Location: Altamont, Kansas
Posts: 15,103
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Thanks for clarifying. My suggestions would be OHC and probably not work.
Need to look at the GY2 type engines. Again Bruce may have one from a damaged engine etc. Allen
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12-17-2008, 07:59 PM | #12 |
Join Date: Jul 2008
Posts: 18
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Mine's definately the OHC. Wish there was enough meat in there
to press in a cast iron cylinder wall. If I come up with anything, I'll post up. Many thanks for the replies. Again, you folks have a very good forum. Glad I found you folks. |
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12-17-2008, 08:20 PM | #13 |
Join Date: Oct 2007
Location: SW Ontario
Posts: 408
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If you need any help with the cam, and can take a few measurements, let me know, I'm in the custom cam business.
I likely don't have any good profiles for your application, but I can probably point you in the right direction |
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12-19-2008, 05:50 PM | #14 |
Join Date: Jul 2008
Posts: 18
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What are your re-grind parameters as far as
tightening up the lobe center, lift change in thousandth's and duration gain? I'm Sure there are no cam cores for this thing! I'm guessing duration is around 210-220 . Emailed the company with the cylinder head (150 and suposedly 200 sport bike) and have yet to hear back. |
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12-19-2008, 08:15 PM | #15 |
Join Date: Oct 2007
Location: SW Ontario
Posts: 408
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Good call on the duration numbers.
It sounds like you know cams. My guess would have been exactly the same. As far as lobe center, I would leave it. If you're after a lift/duration increase, you're going to eat up all the spare lobe you have doing that. I don't know what you want to do, but I think a D around 235-245 at .050" might be a good start. Lift on those cams is probably somewhere in the .200"-.240" range. Depending on base circle diameter, I like to stay in and around +.035"-.040" in lobe lift, and and +20-30 in duration at .050". That usually keeps the geometry OK, and has little effect on rocker ratio. Those lobes will likely also have a real steep ramp on one side. Try to stay with a profile similar in appearance. It will help performance, but also reduce base circle reduction. |
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