02-02-2015, 02:11 PM | #1 |
Join Date: Aug 2013
Location: Goodyear, Arizona
Posts: 407
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78mph
I've been really enjoying the performance of the Panterra with the 200 engine and other mods I've done to it. The latest incarnation with 30mm Mikuni, UNI filter and free flow exhaust had me up to 72mph with the 15/36 sprocket at 7400rpm in top.
I felt the bike had more but aerodynamics were holding me back. So I bought a viper fairing and a 7" headlight to go with it. I finally got it all together on Saturday and took it out for blast Sunday when everyone else was watching the superbowl. I had 78mph showing on the gps at 8100rpm in top. I think this might be all she has to give. regards, Alex
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2020 Tao TBR7 9.3:1 PnP head CRF230F exhaust 4 degree advance key 290 degree cam Nibbi PE30 and cone filter Front fork brace |
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02-02-2015, 02:30 PM | #2 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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Wow! That's impressive, but I think there's always more.
Which jets are you using in the Mikuni? Does the muffler create much back-pressure? Perhaps there's some power hiding in there. Are you interested in "adding lightening?" If you have steel rims, they could be replaced with aluminum, holes could be drilled in gussets, etc. Are the bars aluminum? Are you running light oil? Maybe 10W40 synthetic would free up power. Interested in a performance CDI? That could improve spark advance. Any thoughts on mild porting and polishing?
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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02-02-2015, 02:31 PM | #3 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
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BTW, your bike looks really good.
After reaching the limits of this combo, you can always increase the displacement to 223. Easy and cheap.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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02-02-2015, 02:39 PM | #4 | |
Join Date: Aug 2013
Location: Goodyear, Arizona
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Quote:
The CDI might yield something, I think the exhaust might be worth a little bit too. I really need to find a skinny little 5'-2" girl to ride it versus my 190# fat ass.
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2020 Tao TBR7 9.3:1 PnP head CRF230F exhaust 4 degree advance key 290 degree cam Nibbi PE30 and cone filter Front fork brace |
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02-02-2015, 02:42 PM | #5 |
Join Date: Aug 2013
Location: Goodyear, Arizona
Posts: 407
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thanks, which jug is needed for 223?
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2020 Tao TBR7 9.3:1 PnP head CRF230F exhaust 4 degree advance key 290 degree cam Nibbi PE30 and cone filter Front fork brace |
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02-02-2015, 03:32 PM | #6 |
Join Date: Dec 2014
Location: Deerfield Beach FL
Posts: 1,410
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Very nice looking project.
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02-02-2015, 06:46 PM | #7 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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You're slim from my perspective.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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02-02-2015, 06:49 PM | #8 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
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It depends on your existing bore and stroke, but this kit will take you from 67mm bore to 72.5mm: http://item.taobao.com/item.htm?spm=...id=13243492906
BTW, that's $45.52 USD.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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02-02-2015, 06:52 PM | #9 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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Can you tell us the numbers that are stamped on the motor? They're near the shifter.
They aren't necessarily accurate, but it's a start. I have a China motor with inaccurate info stamped on it, so it happens.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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02-03-2015, 09:53 AM | #10 |
Join Date: Aug 2013
Location: Goodyear, Arizona
Posts: 407
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163fml
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2020 Tao TBR7 9.3:1 PnP head CRF230F exhaust 4 degree advance key 290 degree cam Nibbi PE30 and cone filter Front fork brace |
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02-03-2015, 11:19 PM | #11 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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If your label is correct, the engine has a 63mm bore and a long stroke. To install a 67mm or 72.5mm bore, you'd need to either enlarge the case mouth or swap cases. A new set of cases is cheap at TB.
That would take you to about 229cc with the 65mm bore and 268cc with the 72.5mm bore. Sounds like fun! I bet that would push you to 90mph.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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02-04-2015, 08:35 AM | #12 | |
Join Date: Aug 2013
Location: Goodyear, Arizona
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Quote:
I don't know how many parts could be re-used in a set of wider cases, and how many are different.
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2020 Tao TBR7 9.3:1 PnP head CRF230F exhaust 4 degree advance key 290 degree cam Nibbi PE30 and cone filter Front fork brace |
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02-04-2015, 10:07 AM | #13 |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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That's a neat project. You did a great job.
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Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894 |
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02-04-2015, 11:29 AM | #14 | |
Join Date: Mar 2009
Location: Sardis, BC, Canada
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Quote:
If you could find the larger case that suits the 250 jug, I bet you could swap the internals over. if you could use your existing crank and rod with the 72.5mm piston, you'll be pushing the outer limits for an air-cooled machine.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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02-04-2015, 11:33 AM | #15 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
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Another thought: there is a motor that is labeled as CG300, although Humanbeing says it is actually 270. It is a water pumper which is designed for use in three wheeled trucks.
I bet the crank and piston from that setup could be made to work in an air cooled CG, with a little mixing and matching. I'm currently trying to mate a long stroke crank with a big bore in a CB200, but the con rod length is an issue. If I can swap in a shorter con rod, I think I can make it work. The result will be 248cc. The motor I'm working with is more complex, because the CB200 uses an OHC. That throws the cam chain length out of whack as I raise the cylinder. The CG would be much easier...
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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