What tubes are fitted from the factory?


What tubes are fitted from the factory? Brand? Model or size (i.e. 140/89-18)

When I ordered the bike I also ordered a spare set of tubes. The dealer supplies me with Michelin UHD. I don’t want those due to heat build up on the highway, the fact that the are more cumbersome to change, and because they take up too much space and weight in my luggage.

Joachim 1 year 17 Answers 350 views 0

Answers ( 17 )

  1. I’ve always run HD tubes and never had a heat build up issue. How many highway miles are you riding non-stop?

  2. 15k miles on a set of Bridgestone UHD tubes in my WRR and that little bike has seen 425 mile interstate days. Heat isn’t an issue with today’s heavier tubes since most name branded tubes are overlapping joints now rather then butt jointing. Just installed MotoZ UHD tubes and no issues with the install.

  3. Just run the UHD tubes for safety but pack lighter HD tubes on the bike for emergencies.
    Problem solved!!

    • I’m not that good at mending UHD tubes though. I need a light spare, and a means to repair the punctured one – which then also can’t be UHD… in case of multiple flats in a row (it has happened to me on more than one occation). If it wasn’t so expensive, I would have upgraded to tubelss rims and carried a single spare tube for the rear case that the tyre is torn, or the rim gets damaged. I’ve researched the option of converting exisiting rims – but there are just too many people who have seen these fail. Also, the front beed won’t be too secure on these.

  4. I can ride +1000 km days doing 130 – 145 km/h – though very seldom.
    I want to pack a lighter front tube for emergency, maybe also the rear (most punctures happen to the rear).
    Any specific tube recommendations (main brands only due to sourcing)? I’m also interested in what these have from the factory – whether to replace or keep.

    One more point I need to make, why I don’t want a 4mm UHD tube – I find them more difficult to patch up. I’ve done trips where I’ve had multiple flats and where mending the tube was the only means to keep me going.

  5. I don’t know about heat, but they are HUGE. I could see installing one at home but not on the road. They are just too big to carry.

    • Totally agree. They would eat up half my luggage space, I find them difficult to patch, they are more cumbersome to fit, and they weigh a ton. For me it is a terrible compromize on a long trip.

  6. From the parts fiche, the Yamaha part numbers for the front (two alternatives) are: 94209-21800-00 or 94227-21848-00 . These are from Pirelli. Ofcourse the part catalogues don’t mention the manuafacturer’s part number, the product name or the part specifications. Also, the Pirelli website doesn’t list any inner tubes at all. So I am no wizer as of what tube actually sits in this bike. Regular, HD, UHD? Same goes for the rear:
    94210-18X00-00……………….. I really hate this about Yamaha – when you for instance check out their workshop manual for a simple standard fastener – they don’t supply you with the dimensions – only the part number. So, if I’ve lost a bolt – it ican become a major job trying to figure out something sinmpla as which standard fastener to source locally – or be forced to order directly from Yamaha at a zillion dollars.

  7. 21 tube, goes on the wheel of 18, temporarily of course. It works the other way around. The brand doesn’t really matter, it just has to be light.

  8. It’s your lucky day. I quite literally just took this off today

  9. Run UHD tubes…… heat build up?
    Carry std spare tubes.

  10. To me UHD’s are one of those things I believe give people a false sense of security or added benefit – that beefier, and Ultra Heavy Dutyr, surely must be better? Ride long and fast on UHD on hot summer days, and the UHD is reported to build up heat, which in turn impacts reliability, and which iat any later time can cause catastrophic failure to the tube or valve attachment (I’ve had my front UHD fail on the Autobahn after having done two consecutive +1000km days at high speeds – I’m just greatful the leak was slow). On the other hand, the UHD reportedly doesn’t rupture as readily (blow-out) as a thinner tube does from a puncture (picture a punctured balloon going boom). I have never had a tube of any kind blow up on me – only puncture. Can tubes blow up like a ballon being punctured, or is this just a myth? Personally I think UHD are unjustifiably expensive. In fact, I think they are a poor option for me, rrespective of price. I have UHD (free) and will buy regular tubes. UHD are simply too cumbersome to change – including balancing the wheel (can become a PITA with a ton of led added to the rim). They are also far too large and heavy to bring as a spare (you can bring two ordinary tubes and still have room and weight leftover for whatever else). They are also more difficult to mend – atleast reliably. Also, mostly anything that puncture a tire will also pass right through the tube in the same go. UHD may be better against pinching flats or corrosion flats – none which should occur if you take some care. UHD may however stand up better to collective hard riding over time, on tretious terrain – while on very low pressure. Then again, all except for soft sand, I really don’t lower my pressura all that much simply for added grip. I don’t race and I am more concerned about protecting my wheels from damage. So in short, the UHD really don’t have anythiong I realy need, but does have a lot of things I really don’t want. I may be very wrong on this – this is just how I perceive things.

  11. The safety advantage of the UHD tubes is the overlapping seams.
    The thinner HD tubes are butt welded at the seams – meaning there is only a very tiny area where they are welded together. These HD tubes are dangerous for this eason and I have seen pictures of them literally shredding at the seams explosively when hot.
    I don’t know of any 3mm thick HD tubes that are not butt welded – if there is I would like to know about them.
    You just prived the 4 mm UHD tubes are safer as when you did get a leak it was a slow leak not a catastrophic blow out!!

    • Makes sense that the UHD are safer than the HD if the latter is butt-welded. But, in my case, if I had ran regular tubes, I doubt the tube would have failed at all as I believe the culprit was excessive heat buid up riding at high speeds for 2×1000 kms on hot days.

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