Originally Posted by The Professor asks Yamaha Australia the hard questions...
Hi Professor
Please find YMA response to the points you raise about the new 2012 WR450F model.
We will get you a ride on one ASAP so you can assess the changes for yourself.
Best regards
Sean
NP: In relation to the new WR450 I'd like to hear (and so would DBWers) from Yamahas engineers as to their take on the design issues I spotted in a 20 minute look at the bike.
Please see below. We are only too willing to discuss the directions in development of the new model. There are reasons for everything and we want to share them with you and the DBW readers.
NP: This is the point, I suppose, where the bike manufacturer listens to the riders, explains the design issues and improves the bike in production or alternatively, tries to browbeat, stonewall and stifle debate. The tuners and aftermarket industry will eventually solve most issues. The pressing thing that confronts YMA marketing is the weight of the bike, I think most punters expected the YZ250F-based chassis to be a fair bit lighter.
The WR450F is a rare model in that it has been developed and improved for Aussie riders by Aussie riders, people like Geoff Ballard and Peter Payne have been instrumental in its development since its inception. Along with local input, the engineers have always shown an ability to learn from the marketplace (particularly the Aussie market) to develop what riders want.
The perceived weight issue is addressed below, the key point about expectation is the YZ250F still runs a carburettor yet fuel injection generally comes with a weight penalty of around 3kg. In off road guise the new WR450F tips the scales at 120kg with no fuel (actual weight as measured by us) which is in line with the competition. Yes, it is slightly heavier than the 2011 model largely because of the FI system. But it feels lighter to ride due to the new frame and suspension package as well as mass centralisation of the major components.
NP: I like the new bike but it desperately needs the compression lock and weak starter issues fixed and maybe a lightening kit put together by YMA as an option pack. If those issues have been fixed then the marketing department has dropped the ball in not promoting the hell out of it. The Ballards factory sponsored race team hasn?t helped the issue by dumping the company?s Enduro bike for an MX to run in Enduros. The MX is kick start only so the race team don?t get to input on the starter issues. GB did a great job in fixing the front fork and jetting problems for 2012 (both of which just required the existing bike to be properly tuned)
Please note the 2012 model features a new starter motor and starter clutch unit.
There is a lightening initiative, it is called an off-road competition kit and basically removes the ADR gear and lightens key components such as the front brake master cylinder. If you want to go further (like GB does) you can remove the battery and starter motor. Note that the Ballards team is racing the 2012 WR450F next season.
The Sydney Show is the first introduction of the new model, the Off Road Competition kit (as the lightening kit is called) will be marketed in due course closer to the release of the model in Feb 2012.
NP: I'm not privy to YMAs market research but I can tell you the 4 main issues from the 06-11s were;
1) weight
2) front suspension
3) jetting
4) failure to start (compression lock/weak starter motor).
All four things needed addressing.
1) Weight: already addressed
2) Front suspension: They are off road use adapted YZ forks with WR bottom axle brackets (to fit the WRF axle) and WRF fork protectors. Like the YZ units these forks are twin chamber design but with revised damping settings to provide both the required initial suppleness and to suit the higher level of performance of the new frame. The spring rate is heavier than 2011 units and they are fitted in the ultra strong WRF bottom triple clamps
3) Jetting: A thing of the past, wait til you see how easy the portable Power Tuner is to use
4) Failure to start: new starter motor and clutch fitted
DBW forum issues
NP: 1) It still weighs a tonne, Yamaha dude near died when I lifted it off the ground at the Motor Show...
Weight is in the same ballpark as all the other 450cc enduro models and note the claimed weight includes all ADR equipment and full fuel tank. With the off road kit fitted and no fuel the new model tips the scales at 120kg (we know because we weighed one). Bear in mind we added an FI system that generally comes with around 3kg weight penalty, so the new bike is right on the money. Weight is largely an issue when it is poorly placed in a motorcycle. Yamaha uses mass centralisation techniques to great advantage and the 2012 WR450F feels both light and agile to ride.
NP: 2) The direct igniton has been wiped and the bike goes back to a T-model Ford ignition coil. WTF.
Yamaha use a TCI ignition system - as used on all high performance motorcycles eg. R1 - which is ECU enhanced and tunable through the portable Power Tuner. A separate coil is used to allow the removal of the battery - something that can't be achieved with the previous direct ignition coil. All battery-less FI systems use a separate coil eg. YZ450F. The separate coil has more windings and provides a stronger spark at low rpm. The stronger spark works in conjunction with the EFI and creates a better throttle response. The 2012 WR450F battery can be disconnected (plus you can remove all the starter mechanism if weight is an issue for you) and the bike will still run successfully due to the new ignition system.
NP: 3) Said coil is mounted hard up behind the LHS radiator. As soon as the radiator gets a whack it'll stuff the radiator, coil or both.
Time will tell, but the model has been extensively tested and no issues so far.
NP: 4) The 'YZF style' rear suspension is the same old WR stuff from 06, the shock is still 16mm. Same swingarm, delta link and pull rods. YZF my arse.
The shock is completely different to the 06 model shock in every way. We found a 16mm shaft has much better damping abilities and valving options than an 18mm and you will see on the 2012 YZ we have returned to 16mm shaft ? one reason for the YZ inspired description.
The new WRF shock has a shorter stroke, increased gas pressure and altered settings from the 2011 unit to suit the new twin chamber front forks and YZ250F chassis. And a sealed nitrogen reservoir cap that can only be accessed with a needle tool to bleed it for disassembly. 2011 model has a Schrader type valve and cap.
Yes the swing arm and linkages are the same as the 2011 model, and that is because this setup has proven to provide the suppleness required for rocky strewn surfaces whilst maintaining the rigidity that goes with the new frame and suspension. The link type suspension has so many advantages over a fixed swing arm type which some competitors still use EG Progressive load character, use of a smaller spring and shock assembly and increased mass centralisation.
NP: 5) Those dopey pointy radiator shrouds will catch EVERY stick for miles, who designed them ? Husqvarna?
The shrouds are the same as the YZFs. The hundreds of off-road riders that have used them in competition and recreational riding haven't complained yet.
NP: 6) The starter motor and de-comp system are the same. It'll still be hard to start and lock-stall like the old ones.
Incorrect. Starter motor is not a unit construction like the previous models, it is a separate construction and totally different.
NP: 7) Fuel capacity back to 7.2L from 8L
Correct, but ballpark with other 450cc enduro bikes (EG Honda = 7.2 litres, Suzuki = 6.2 litres). Also note that Yamaha's FI system will give better fuelling and hence economy than a carby system. Plus the Power Tuner will let you decide overall mapping to suit your needs and track/surface conditions.
NP: 8) $13990 RRP ride-away......
Note the price ($12,999 RRP inc GST) is the same as the 2011 model yet the new model is supplied with an FOC off road kit that is valued at $650. We believe this is a great price for a bike that is so versatile that it can be trail ridden or raced AND still be performing well in five years time.
NP: 9)Would you sell a re-valved and well-jetted 2011 to buy a 2012?
Yes - you need to ride one to understand the 2012 changes have transformed the ride. We can arrange this