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Post by rockynv on Aug 18, 2016 22:32:20 GMT -5
The Power Pure design is great for preventing head shake on the front wheel but this ability to prevent head shake also reduces its ability to handle wet roads. On the Shinko you may need to be careful with your tire pressures so the tread blocks do not feather due to squirm during hard braking which can become an issue with a big guy on a comparatively small bike. Sometimes just upping the front tires pressure 1 or 2 psi over whats on the tire placard mounted on the bike can help prevent this mind you as long as you do not exceed the MAX psi stamped on the tires side wall.
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Post by rockynv on Aug 18, 2016 3:52:27 GMT -5
One danger with the sliders is that on some bikes the belt may ride far enough past the rim of the variator to pull any oil sump gaskets it comes close to out. Not sure about the Yamaha design however on a number of dry sump engines this has been an issue. Simply trimming any excess gasket material sticking out into the belt path off with a razor will many times be all thats required to prevent this.
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Post by rockynv on Aug 17, 2016 3:52:54 GMT -5
The bigger carb can also hurt you if you do not have an electric fuel pump. The stock air cleaner usually has a tuned port feed tube going into the carb to maintain vacuum and intake pulse to keep the diaphragm in the fuel pump fluttering and pumping fuel. The slide in the carb mitigates this to a degree but not past a certain point.
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Post by rockynv on Aug 15, 2016 4:02:47 GMT -5
I really do not remember. I lost the email with the pictures that I sent out to the short haul truck center that installed them who is now out of business. I almost refused them because they really did not smell right and were off gassing when I picked the rig up. It was almost like they were not properly vulcanized and still raw but the tire shop assured me that it was because it was a new long life formulation that they smelled different. I'll see if I still have any paperwork on them in the rigs service binder which is not here at this location right now. |
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Post by rockynv on Aug 14, 2016 10:17:36 GMT -5
Wish I had saved the pictures of the last set of Chinese tires I bought. Not Double Coin though and they went out of round almost immediately and the one that ballooned after less than one year was unbelievable. Commercial Tire Shop and Recapper that I brought them too said even though they were basically new and had plenty of rubber to plane them true that they were of such poor quality that they would/could not use them for anything more than mulch. Set of seven new Chinese 16 ply 245/70R19.5 costing almost $3,000 out in the trash.
You roll the dice when you play with the Chinese brands and the tire vendor that your dealing with becomes even more crucial to ensure that they did not order a custom cost cutter version of a popular tread pattern that just barely meets DOT standards.
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Post by rockynv on Aug 13, 2016 10:38:19 GMT -5
As usual some don't read or understand what I wrote tires from Goodyear are also made in china and that's china control. Remember our government controls the meaning of what and how it's made so many company's do minimal just to slide by the standards Government sets No actually with the Goodyear that are for import into the USA or any other country for that matter they are under Goodyear's more stringent control. The Chinese are only concerned for the most part with whats sold in China The G670 RV for example will last a full 6 years here in Florida because their rubber formulations have more Carbon Black and UV protection than many of the others while the Chinese branded tires depending on which importer ordered them will have substantially less and may quickly take on a brownish tinge. Too many will only hold up on construction sites or short haul trucks where the tires never see high speeds and tend to get torn up beyond use in a year or so. Double Coin makes some really good tires and some really bad ones too. It is all like Chinese Scooters they will only be as good as the US importer specifies them to be. If they are just paying to barely pass DOT standards which are the minimum standards then you will be getting a minimal quality tire. Goodyear has been investing both State Side and abroad to upgrade all factories that make tires for them to meet the Worlds most advanced standards. My family was involved in developing tires for almost 50 years with my Father holding a Masters in Chemical Engineering designing rubber formulations for tires in all civilian, military and industrial applications including some industrial tires that saw high speed use 24/7 until they wore out. My Uncles side of the family mostly designed, built and maintained the Vulcanizers. Family dinners and picnics were more like going to school as everyone talked shop. |
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Post by rockynv on Aug 12, 2016 4:17:08 GMT -5
Tires in general are all the same as far as I'm concerned. Story camping next store camper starts a conversation about tires I mention I went to G load range made in china because couldn't find any USA tires. I says to me I would never put on China tires he buy Goodyear. Later that day I was at his camp site happen to look at his Goodyear tires guess were it was made yep china LOL. I called him over and showed him was it said he nearly fell over and said you bet he will be going back to dealer over that. I then googled goodyear tires found they have 6 plants in china. You just never know so that's my point. Our government like fuzzy math like a tire 2 ply this and 2 ply that and 2 ply is rated as 10 ply our government is our worst enemy on safety of tires IMO Goodyear has a bit better quality control and overall rubber chemistry than the usual Chinese branded tire. I tried the Chinese branded tires on my RV once and though properly inflated two herniated similar to what OldChopper showed us with the belts coming through the treads. They smelled wrong too from day one. When I called for assistance putting on the spare after I noticed one had suddenly increased in diameter the commercial tire tech the moment he got the tire out of the wheel well just froze and shouted "Dear Lord everyone get back!", gently lay the tire down and put a remote deflator hose on it letting the air slowly out from 20 feet away. That guy looked white as a sheet and I can't blame him as those steel belts if they let go on a H rated tire at over 100 PSI would have disemboweled him at the least or possibly even took his head off. |
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Post by rockynv on Aug 11, 2016 11:40:11 GMT -5
WOW ! 100 verified MPH out of a 250 , Who the heck needs a big heavy 400cc + scoot at that rate ! The 365lb Aprilia RS250 in stock trim would hit 107 mph in the quarter mile and had an advertised top speed of 130 mph. Lightely modded they would break 150 mph. Aprilia has alway had a knack for doing more with less. Its great when you see their current 1 liter bikes blowing away the competitions 1.5 and 2 liter models. |
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Post by rockynv on Aug 11, 2016 3:52:25 GMT -5
A good local dealer who only sells fresh tires is worth the extra few that they charge. Fortunately the largest multi-namebrand dealer in the area makes it a point of pride to meet or beat even internet pricing on fresh new tires. Motorcycle/Scooter tires that are over a few years old get sold to make mulch. Most tires I have received from them were manufactured within 6 months or less of the date they sold them to me and mounted them on the bike. Nice waiting area to sit in while they mount you tires or work on your bike and free coffee if you want to mosey next door to the dealership and stroll through about 1,000 bikes on display there that are representative of what they have in their warehouse.
Glad you caught it before you put on a show that could have be the final act. Tire looks old though in the picture and could have split from being bruised some time ago from hitting a chuck hole or some debris on the road.
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Post by rockynv on Aug 10, 2016 4:15:46 GMT -5
New neighbors?
My dogs tend to keep those guys at bay. The Giant Akita was great as even those that thought she was a beauty were afraid to do more than look at her from a distance. Said they could tell that she was quietly sizing them up and keeping a constant eye on them. A locked solid core door would not stop her either unless it was steel clad and hollow interior doors didn't stand a chance which I found out the hard way. 20% stronger bite than a Pit Bull.
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Post by rockynv on Aug 10, 2016 4:07:10 GMT -5
The sliders and the correct windshield are usually all it takes. Most use a barn door windshield thats way too high and not very aerodynamic so top speed suffers. I now get much better top end performance on my bike once I put a Puig Sport Fairing on the bike instead of a Windshield. Interstate travel is in the middle or far left lane now with little issue keeping up with the flow or traffic. Mind you I am riding an Aprilia Sport City powered by a Piaggio 250cc engine and am riding on a 130/  -15 Metric Cruiser rear tire and 120/70-15 up front. I probably have the same if not close final ratio as you. Even though I have 13 inch tires. The factory fixes all that stuff when they design the scooter for it's intended purposes You are Probably getting your big edge from having a 4 valve engine instead of a two valve engine like my old school Yamaha 250 Majesty clone Linhia. You are definitely right though on the aerodynamics tip though. I'm long waisted and almost 6'4. So I am well up in the wind stream above my stock shield unless I'm in a tuck. The 20 Something HP 4 Valve Engine, EFI, Sport Fairing and Large Wheels with Motorcycle Tires do help as does the relatively high compression ration. I inadvertently buried it once just flowing with traffic late one night. Can't see the speedo very clearly without my reading glasses and the chin bar on my full face helmet blocks the view of the speedo but it was a true 100 mph according to the GPS that one time flowing with traffic which was quite a realization since everyone knows a 250 taps out at 80 mph. Won't knowingly do that again but now I know its there. |
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Post by rockynv on Aug 9, 2016 12:06:00 GMT -5
The sliders and the correct windshield are usually all it takes. Most use a barn door windshield thats way too high and not very aerodynamic so top speed suffers. I now get much better top end performance on my bike once I put a Puig Sport Fairing on the bike instead of a Windshield. Interstate travel is in the middle or far left lane now with little issue keeping up with the flow or traffic. Mind you I am riding an Aprilia Sport City powered by a Piaggio 250cc engine and am riding on a 130/ -15 Metric Cruiser rear tire and 120/70-15 up front. |
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Post by rockynv on Aug 9, 2016 3:54:24 GMT -5
I went down June 2015 on some invisible sugar sand that was blowing across the dry hot road going about 45 mph during a minor lane change. It was like being on a pizza peal covered with corn meal. In June the roads here can feel as hot as a pizza oven too. Had my gear on with the exception of regular jean instead of riding pants. The bruises on my knees are almost gone.
As for a 3 month old bike well you may have purchased it 3 months ago however Honda bought the tires sometime well before they built the bike and then sent it on a cruise across the Pacific after which it sat in a warehouse for some time awaiting Customs inspection before it was sent to Honda's distribution center to await being shipped out. From the distribution center it may have gone on a train ride to a more local shipping hub where it sat for a while waiting to be sent by truck to the dealer. At the dealers it sat for a time in the crate until they cleared space for it on the floor or they had a buyer for it. Some years can go by from the time the manufacturer purchases the tires and the end user receives the bike with them installed on it. Meanwhile the tires start to age from the moment that they are pressed with the aging process accelerated the moment they are mounted and inflated even if they are never ridden on.
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Post by rockynv on Aug 8, 2016 22:33:34 GMT -5
Don't fret about not getting the piaggio most if not all of their engines/drivetrain are made by either sym or kymco ,,, Actually its probably the other way around however Piaggio did subcontract TGB to cast variator sheives for them somewhere about 2009. Earlier bikes may have had a Rotax Engine made in Austria especially on their Motorcycle Brands and Aprilia line of Scooters. Piaggio supplies engines to Derby, Pugoet, Aprilia, MotoGuzzi, Vespa, Guilerra, John Deer along with a number of Custom Motorcycle and Scooter Builders. |
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Post by rockynv on Aug 8, 2016 4:13:45 GMT -5
Pretty sure that's what I said, just a lot less words. Nothing close. Speed does matter as the bike goes from Idle to RedLine at Max Speed as set up from the factory. Yes if you break the rules you can force RedLine early however you are warned not to do that in the owners manual. In normal operation when riding the bike as per whats specified in the owners manual you should never see RedLine at anything but Max Speed unless there is something wrong or the bike has been modded with extremely light rollers. |
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-15 Metric Cruiser rear tire and 120/70-15 up front.
