Hawk on highway/tire question - Page 2

JohnDoe2887 · 08-22-2016, 12:53 PM

Quote:

Originally Posted by kohburn

after you exceed 60mph then wind resistance climbs almost exponentially. I've hit 70 with a tail wind while tucking running a 17/43 sprocket combo on the TT250. it will cruise 63-65 sitting up with that combo.

is there not another route you can take that skips the 70mph zone? and is that a 70mph speed limit? or flow of traffic, because if its a speed limit you will still be getting run over.

Flow of traffic is not to bad, people are somewhat okay with 70 (bikes) and it's barley a mile, it's the other one I am worried about. I will measure it today on my way to college.

Torgo · 08-22-2016, 12:54 PM

Stock, I could get it to the low 50s. With a 17T front and a carburetor hack, I can hit the low 60s.

I don't consider it a highway bike for that and other reasons, like the knobbys and brakes. It's a great dual sport and secondary road bike, but sustained cruising on US highways seems rather adventurous to me. Here in TX, the top speed limit is 85, most rural highways are 70.

I'm very pleased with what it does and its limitations, but I didn't buy it for commuting or cruising. If I needed to do serious road time, I'd look at something else.

JohnDoe2887 · 08-22-2016, 01:33 PM

Quote:

Originally Posted by Torgo

Stock, I could get it to the low 50s. With a 17T front and a carburetor hack, I can hit the low 60s.

I don't consider it a highway bike for that and other reasons, like the knobbys and brakes. It's a great dual sport and secondary road bike, but sustained cruising on US highways seems rather adventurous to me. Here in TX, the top speed limit is 85, most rural highways are 70.

I'm very pleased with what it does and its limitations, but I didn't buy it for commuting or cruising. If I needed to do serious road time, I'd look at something else.

Ware in Texas is the speed limit 85? (I am also in Texas, the highest limit I have seen is 75mph....)

Torgo · 08-24-2016, 02:14 PM

Quote:

Originally Posted by JohnDoe2887

Ware in Texas is the speed limit 85? (I am also in Texas, the highest limit I have seen is 75mph....)

https://en.wikipedia.org/wiki/Texas_State_Highway_130

BlackBike · 08-24-2016, 04:52 PM

Quote:

Originally Posted by Torgo

https://en.wikipedia.org/wiki/Texas_State_Highway_130

also, seems to me like it's 80mph out west of kerrville or junction on interstate 10.

yea, that 85's on a toll road, so you have to pay to play.

katoranger · 08-25-2016, 10:05 AM

70 is asking a lot from any of the China bikes. That would be top speed with the right conditions. Replacing the knobbies with street tires will help with a couple mph and a more stability at higher speed.

The best solution is to find a different route.

Azhule · 08-25-2016, 11:23 AM

Quote:

Originally Posted by katoranger

70 is asking a lot from any of the China bikes. That would be top speed with the right conditions. Replacing the knobbies with street tires will help with a couple mph and a more stability at higher speed.

The best solution is to find a different route.

I must be asking a hell of a lot from my little Bashan 197cc then... I ride that China Bike on I-25 going 70 - 75 mph for an hour or 2 straight (7,000+ RPMs)... no real problems other than fuel economy dropping below 60 mpg at those speeds... and the days with 30+ mph winds I can only go about 63 mph without a wind break from a car/truck in front of me...

Granted... I only weigh 120lbs... and the Bashan has 17t front 39t rear sprockets... and the 197cc engine has 9:1 compression... but I really don't see why the HAWK with the 229cc engines can't do 70 mph for a measly 1 mile stretch... I've gone over 100 miles on I-25 going 70+ the whole time...

Maybe it's time to talk the Mrs. into buying me a HAWK/TT250... that way I can see first hand how much slower 32 extra cc's is

Weldangrind · 08-25-2016, 12:10 PM

Quote:

Originally Posted by Azhule

Maybe it's time to talk the Mrs. into buying me a HAWK/TT250... that way I can see first hand how much slower 32 extra cc's is

Not much, as I understand. I can maintain a little north of 60 on my Lifan 200, and I weigh nearly two Azhules. I think the wind resistance is the issue at this displacement level. I presume we'd need to be well above 250cc to go much faster.

I have a 229 in the shop and I might install it for giggles.

Mudflap · 08-25-2016, 05:02 PM

Wonder if the valves are the same size on the 200 and 230, if the cam cut is the same, if there are any differences other than a bigger bore? Both my Lifan 200 and Zongketa 200 will do a little north of 60 with the Zong being a couple MPH faster than the Lifan. I too am about 2 Azhules in weight.

Anyone running an aerodynamic windshield? I made one for my Vespa 200 many years ago and it made a big difference in top speed.

Quote:

Originally Posted by Weldangrind

Not much, as I understand. I can maintain a little north of 60 on my Lifan 200, and I weigh nearly two Azhules. I think the wind resistance is the issue at this displacement level. I presume we'd need to be well above 250cc to go much faster.

I have a 229 in the shop and I might install it for giggles.

JohnDoe2887 · 08-26-2016, 08:01 PM

Quote:

Originally Posted by Mudflap

Wonder if the valves are the same size on the 200 and 230, if the cam cut is the same, if there are any differences other than a bigger bore? Both my Lifan 200 and Zongketa 200 will do a little north of 60 with the Zong being a couple MPH faster than the Lifan. I too am about 2 Azhules in weight.

Anyone running an aerodynamic windshield? I made one for my Vespa 200 many years ago and it made a big difference in top speed.

Do you have any pictures of that by any chance? I am not 100% sure on how to make a motorcycle windshield aerodynamic with out laying down.... On mine one of the first things I plan on doing is replacing that horrible head design.... I know I can make something better....

Ariel Red Hunter · 08-26-2016, 08:15 PM

Quote:

Originally Posted by Weldangrind

Not much, as I understand. I can maintain a little north of 60 on my Lifan 200, and I weigh nearly two Azhules. I think the wind resistance is the issue at this displacement level. I presume we'd need to be well above 250cc to go much faster.

I have a 229 in the shop and I might install it for giggles.

I had an AJS 250 that would just touch 80 mph, with me down on the tank.

pete · 08-26-2016, 08:17 PM

Almost any smooth angled surface is going to be more
aerodynamic than your chest....

Tires try a set of Kenda 761...
80% road / 20% firm/hard dirt..

....

JohnDoe2887 · 08-26-2016, 08:29 PM

Quote:

Originally Posted by pete

Almost any smooth angled surface is going to be more
aerodynamic than your chest....

Tires try a set of Kenda 761...
80% road / 20% firm/hard dirt..

....

But what about the additional drag crated by the windshield? Thanks for the tire suggestion I am thinking though about getting straight street tires for now.... Then fun tires for my down time....=)

pete · 08-26-2016, 08:35 PM

Quote:

Originally Posted by JohnDoe2887

But what about the additional drag crated by the windshield? Thanks for the tire suggestion I am thinking though about getting straight street tires for now.... Then fun tires for my down time....=)

the drag is always there it is either coming from your body with a
unaerodynamic jacket or a smooth angled surface of a screen I
think the screen would win that race for less drag...

..

JohnDoe2887 · 08-26-2016, 09:04 PM

Quote:

Originally Posted by pete

the drag is always there it is either coming from your body with a
unaerodynamic jacket or a smooth angled surface of a screen I
think the screen would win that race for less drag...

..

Would there be twice the drag from the windshield and jacket?
Disregard that.... Could some plexiglass punched metal they sell at Home Depot,(it comes in rolls and is about 1/8in thick) and some pipe clamps be a good place to start?

08-25-2016, 10:05 AM	#21
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	70 is asking a lot from any of the China bikes. That would be top speed with the right conditions. Replacing the knobbies with street tires will help with a couple mph and a more stability at higher speed. The best solution is to find a different route. __________________ You meet the nicest people on a Honda Clone.
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08-26-2016, 08:17 PM	#27
pete Join Date: Jan 2012 Location: ChCh , NZ Posts: 2,266	Almost any smooth angled surface is going to be more aerodynamic than your chest.... Tires try a set of Kenda 761... 80% road / 20% firm/hard dirt.. .... __________________ 09 XT660R ... 06 TTR250 ... 80 Montesa H6 125 Enduro... 77 Montesa Cota 348 MRR "Malcom Rathnell Replica"... Current resto projects.. 81 Honda CT110... 80 Kawasaki KL250A1... 11 Husaburg TE125 enduro... "sold" along with another 31... Lifan 125 Pitbike.. "stolen" ... KIWI BIKER FORUM...... http://www.kiwibiker.co.nz/forums/content.php All the best offroad rides in NZ... http://www.remotemoto.com/ E-mail... xtpete1@gmail.com
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08-22-2016, 12:54 PM	#17
Torgo Join Date: Oct 2015 Location: Texas Posts: 93	Stock, I could get it to the low 50s. With a 17T front and a carburetor hack, I can hit the low 60s. I don't consider it a highway bike for that and other reasons, like the knobbys and brakes. It's a great dual sport and secondary road bike, but sustained cruising on US highways seems rather adventurous to me. Here in TX, the top speed limit is 85, most rural highways are 70. I'm very pleased with what it does and its limitations, but I didn't buy it for commuting or cruising. If I needed to do serious road time, I'd look at something else.
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