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Post by dan51 on Apr 4, 2007 10:39:50 GMT -5
does anyone know a Linhai Yamaha web site to see the specs (bore, stroke,compression ratio, KW rating, etc. etc) on the new 257cc engine. I went to Linhai site & it does show a LH170MM engine but no specs come up
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Post by cloudaz on Apr 4, 2007 20:47:19 GMT -5
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Post by dan51 on Apr 5, 2007 2:21:53 GMT -5
Wendell
thanks for the reply, went to web site and saw 70MM Bore X 57.8 Stroke which does not calculate out to 257CC. I went to the post "250 chinese engines" that Banditsms posted and although alot of useful info found no website anyone mentioned for the Linhai Yamaha engine. I have read alot of good info on scooters from everyone here . One thing everyone agrees on: SOME and I repeat some of the dealers have no idea what they are selling. Saw the Strada 300CC advertised on ScooterTronics website, and altho I 've read many peoples good comments about them when I questioned them for more exact specifics, 1st they directed me to PowerSports web site which only has generic specs, when I questioned them again for more exact specs I was looking for, Bore, Stroke, compression ratio, Kw & Nm rating I haven't heard a word. Some one mentioned (I'm not quoting here) if we can't believe the manufactures info on their websites we can't believe any of it. The Strada, the Mainstreet 260 are the scooters in my budget. The fact that Yamaha joined with Linhai is also appealing. It appears to me it's a strong effort to enter into the lower end maxi scooters market. I would like to find the specs I'm looking for on the engine before spending money on something that won't cut it.
Also: noticed one of Banditsms post about the specs received from Charles NI, Export manager, CFMoto. it mentioned Ps. this is being quoted from wikipedia.org/wiki/horsepower. PS, this unit(German: Pferdestarke=horsepower) is no longer a lawful unit, BUT is still commonly used in Europe, South America and Japan, especially by the automotive & motorcycle industry. It goes on a bit and then states, PS is always measured at the wheels, as opposed to most factory horsepower figures, which are rated at the crank & no accounting for driveline loss. NOW think about this, 18 PS is calculated to 17.75 horsepower to the wheels.
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Post by scooterollie on Apr 5, 2007 9:08:13 GMT -5
Dan;
Yamaha didn't team up with Linhai. They contracted with Linhai a few years ago to make some things for them. Apparently, Linhai bought the rights to make the 257 cc version of the Yamaha engine and it is showing up in some of the Chinese scoots exported to the U.S.
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Post by banditms on Apr 5, 2007 19:25:42 GMT -5
dan51, Sorry I didn't put up a link for the Linhai website to show where I got the info about the bore x stroke and power ratings on the 257cc engine... I suspect it isn't there any more as my link goes no where now. They actually had the website set up with specs for all their engines in a different area than the product pages themselves - oddly enough. But don't fret, there are other alternatives... ( - ; First you have to take what you know... then add a little of what you suspect... and then use a little Google finese - and maybe, you get an answer to your question. Initially, we thought our Bandit UC-250z was a 'shape' copy of the 1996-99 Yamaha YP250 Majesty. In other words, the outside panels looked the same or very similar - but the internals were different since the Yamaha engine was 249cc and our UC-250 has a 257cc Linhai engine. But recently, we discovered and secured the Service Manual for the Yamaha on CD, and low-and-behold, it was an identical clone - engine and all. The only differences we have found is where the battery box / coolant reservoir was on the Yamaha is not the same as our UC-250z. Also, there are some extra features on the instrument panel of the Yamaha... something to the effect of a warning light to tell you that your one hour photo's are finished and ready to pick up at Wal-Mart. So from there, you can do searches for 1996-99 Yamaha YP250 Majesty and you find plenty of information on them... including that they were a 69 x 66.8 mm bore and stroke (249.5cc) at about 20HP. So where does the 257cc engine version come from? It's the Yamaha 249cc engine bored to 70mm (70 x 66.8mm = 257cc). From what we can tell from the Yamaha Service Manual, there are very few if any differences. The Yamaha and our UC-250z are so close, that we suspect Linhai actually bought (or recieved) the tooling for the old Majesty from Yamaha for whatever reason. Why clone a scooter to the 'Nth' level of detail when Yamaha is moving to a new generation model anyways... So that leads us to the comment from ScooterOllie. And all you have to do there is Google 'Linhai Yamaha' and at the very top of the regular listings is a link to Yamaha Motors, Japan website explaining their buy-in along with Linhai power group and the already established "Yamaha Motor's motorcycle manufacturing joint venture Jiangsu Linhai Yamaha Motor Company Limited, known as LYM"... to form a new company called Yamaha Taizhou OPE for building engines. The website goes further to say that 'LYM, itself a joint venture between Yamaha Motor Co., Ltd. and Jiangsu Linhai Power Machinery Group Corporation, manufactures and markets complete motorcycles and engines under the Yamaha brand name." AKA - Linhai-Yamaha... and now, all of the pieces start to fall into place... ( - ; Now, Yamaha USA hates that name and will sue and destroy any importer who links Chinese Linhai scooters to the Yamaha brand for the purpose of marketing... no matter that their own website says its true. So you guys can't quote me on any of this stuff, OK? Ps - dan51, I liked your explanation of the Ps power designation and how it relates to power output. But since the BikeZ.com website shows the 1998 Yamaha YP250 Majesty having a HP rating of 20, I should probably change mine to be 20.5 or 21... since it's a larger displacement engine. Now watch as several online sellers change their HP ratings tomorrow to 21 HP... LOL That's just my opinion - I could be wrong... and where's my Karma points after some good posts like this one??? LOL Jim J... Bandit MotorSports www.bandit-motorsports.com |
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Post by Aaron on Apr 5, 2007 19:56:42 GMT -5
Great info again Jim. I'll give you a Karma point but it's beneath you to beg...LOL
Aaron
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Post by scooterollie on Apr 5, 2007 21:10:24 GMT -5
Jim;
Thanks for the update and more complete info. Things are really changing fast in China with all the partnerships and buy-ins by companies from other parts of the world. Add to that the misinformation and intentional misleading information and it gets real confusing, real fast. Slowly, though, the puzzle pieces are falling into place!
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Post by dan51 on Apr 6, 2007 12:37:44 GMT -5
Jim J
Thanks for the great info, I had seen the joint venture thing between yamaha / Linhai in earlier goggle searching. Then I saw the Linhai-Yamaha engine being advetrtized in chinese scooters. Scooterollie is right on with his comment, "Add to that the misinformation and intentional misleading information and it gets real confusing, real fast." You can't make an intelligent decision with all the misinfo. My theory, if know what your buying you know what to expect. Yamaha & Linhai have been manufacturing for something like 40 years so one would have to think this engine would preform well with reliability.
By the way I'm new to this forum & fairly new to scootin.This is a great forum & with the info & help from everyone here we can figure this stuff out. I will do some searching when time permits with the info you provided & reply my findings
Jim: I noticed on your web site you state 75-80 MPH for your UC 250 depending on weight etc. Will this scooter run highway traffic speeds (65 mph) & have something left to get out of way if need to ?
I also noticed in some of your earlier replys talking about tires, This is another real confusing area for me. 130/60, what do the numbers actually mean. I also have seen the same size tire for differant rim sizes, is this correct ?
Thanks again Dan
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Post by banditms on Apr 7, 2007 15:50:27 GMT -5
Dan51, Yup, the UC-250 has power on top of the normal highway cruise speed of 55-60 mph... that's why I waited to get one when I could have been riding my UC-150 model a year earlier. The UC-150 can get up to the 60-65 mph speed needed to be on the highways here in Oregon, but there was no power / speed available above that. So emergency manuevers wouldn't have worked to well if / when I needed them... And in regards to your tire / wheel size question, I have been wanting to start a new thread in regards to that very subject. I get a lot of questions over the e-mail and on the phone from people wanting to know just exactly what it all means. So look for that in the general section of the forum... Later, Jim J... Bandit MotorSports www.bandit-motorsports.com |
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Post by cloudaz on Apr 7, 2007 22:58:19 GMT -5
Jim,
I thought the minimum cc's for highway use was 200cc. Last year I got pulled over by a DPS officer on his BMW, he claim that I was not big enough to be on the freeway, hence the bigger 250 stickers I put on my UC250. So he pulled me over for nothing after his call in and found out the minimum was 200cc. 150cc might get ya a wrist slappin.
Later
Wendell
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Post by banditms on Apr 8, 2007 22:07:26 GMT -5
Wendell,
The laws very state to state. Here in Oregon, it's 250cc or larger to be on the freeway, but only 150cc to be on the state highways. CA only requires 150cc to be on it's freeways... and WA is more of a rule of thumb than anything - keep up with traffic. I don't believe there is a federal guide line on the matter as max speed limits are up to the individual states now...
Jim J...
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Post by HPS MotorSports LLC on May 7, 2007 2:51:17 GMT -5
I have sold many Mainstreet 260's and 300's...BELIEVE ME the 300 is an awesome motor and I got it up to 88mph!! Lots of power you wont be disappointed
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