Whats everyones view on the Yz465h

[777klx]

Looking at buying a 465h for Racing evo class. I rode the bike and loved the power and torque and how nice it felt.
What's everyone's experience with them

[Ted]

#1

[YZ250H]

You can't go wrong 

[80-85 husky]

ive never ridden one but a mate had one new and he flipped it within 2hrs of buying it.

he said at the time the power was brutal and slightly unpredictable and he also canned the monoshock, causing some headshake and twitch witchy in the bumps.

he probably knew f*kall about bikes then and had just bought the "biggest" yammie dirt bike he could find. (as you do )

probably easy to tune the motor to be predictable and im sure the handling would be fine if both ends are sorted out but I just thought I would throw these comments up as he stills shudders when "465" is mentioned and everyone so far says its the bees knees.

personally I don't think you could go wrong....go for it.

[head]

Awesome bike. Very under rated.

[craigclayton]

A friend of mine in the U.K. has purchased one, needs a bit of work but looking forward to riding it??

[Ted]

777. What you are intending to buy is a 35 year old MX bike that originally came with no warranty and had a shelf life of about 8 months. Total. What you have to be 100% sure of is that the engine cases are in good condition. If the two case halves are rooted, so are you. Everything else is repairable.

Then you need to work out who is riding it. If you are mid pack or less just ride it as it came. It is super reliable and parts are easy to get. Probably the easiest bike to keep running. However if you want to win or put someone on that will win there is quite a lot of things that need addressing.

All of these modifications are completely legal under the current MA Evolution class rules.

Transmission: The standard 5 speed box cannot handle power. The shift forks ( virtually unobtainable ) give out real quick under hard use. Fit a later model 490 4 speed gearset giving you shorter, more stout shift forks. Fits straight in.  The other advantage to a 4 speed is that it drops the rpm's further down on every up change, enabling it to operate in the torque curve.

Engine: Move the HP further up the rev range( make it peaky as f..k) by way of porting cylinder. This will enable way more torque lower down. Fit PFR pipe and muffler. B8ES plug. Nobody can use 50+ HP mid corner. Set the squish in the head.

Clutch: Fit hard anodised billet clutch basket. Standard Yamaha clutch plares

Suspension: Rear, fit 16mm shaft enabling modern piston and valving. Hard anodise inner shock body to eliminate internal wear. Front, fit later model cartridge fork inteernals. Plenty will carry on about Yamahop. Just ask them what it is and how to fix it. They will go real quite then. This is the fix. If you don't dyno test the suspension with somebody who knows what to do you are only guessing.

Steering: Fit later model vertical top  triple clamp to eliminate the swept back bar position.

Frame: Gusset frame and weld full width skid plate under frame rails. Fit oversized ( thicker alloy ) engine plates and oversized high tensile bolts. Fit way oversized head stay bracket. You will not break a head or barrel. You need to take the flex out of the frame.

Intake: Fit Mikuni 38mm flat slide and VForce reed.

Fuel tank: Off a 250H

Seat: Ribbed vinyl

Throttle: Current Domino 2 stroke 1/4 turn as used on new KTM's

Brakes: Machine drums perfectly round and get oversized linings made to match. Learn how to adjust twin leading linkage setup properly. It ain't hard.

None of this stuff is cheap but if you want a bike that will absolutely donkey lick anything in it's class then this is what will need doing to keep it out front

[80-85 husky]

just get a 430 a/c husky and ride it.. .. they come std with all that stuff

[Husky500evo]

If you were going to spend all the time , effort and expense to set up a YZ465H as described in the earlier post , then you would be better off with an '81 Maico 490 to start with . That is why 90% of the bikes on the start line at Farliegh Castle VMXdN twin shock class are Maico 490s . I have owned and raced both YZ465H Yamahas and Maico 490s and think that the only things that are better on the Yamaha are the forks and front brake . The Yamaha is still a good bike though and can be competitive with a good rider on board . I just think that there are better Evo class bikes out there and the Husky CR430 , 500 and fourstroke 510 also come to mind.

[Slakewell]

IMO the best EVO class bike ( apart from the Maico ) is the very underrated KTM 390 

[80-85 husky]

that's a good point, husky 390 / kato 390 would be better  midpack bikes, easier nicer "hold it wide open" power delivery.

[Ted]

The initial question was what experience have you had with them, not what you think of other brands
Go down to your local Maico, KTM and Husky shops and try and buy parts for a 81 model. No problem there at Yamaha.

[skypig]

What you have to be 100% sure of is that the engine cases are in good condition. If the two case halves are rooted, so are you.

Is there a way to do this without engine disassembly? Where do they wear/fail?
I've heard they can crack around the kick starter shaft.

[Mick D]

I looped out a IT6465 in an outback QLD gravel pit, big time. Purchased half hour away in Emerald a few hours earlier
4th hole monos. I was wearing steel cappers, stubby shorts and a king Gee singlet.
Everytime I tumbled/skidded through the gravel, as my head came up,,,,I could see the IT end for ending
Did I mention the gravel?
Ouch!
It nearly ripped the shorts off me,,,
They could have held me by the hair and dunked me up and down in that red shit(mercurochrome)
BUT,
Owner was overseas. I was mine manager and caravan park manager. So had to hang in there
Super infectious outback water. I had to pour 6 bottles of metho over my wounds during the course of everyday.
for a couple of months,,,,,,,,,,,,,,,,,,,,

It was a much better scrub bike than the new DR500 that I had arrived there on. A hoot to ride.

When I returned to Newcastle, I grabbed a near new mint YZ465 for a hundred acre bike on the foot of Stockton sand dunes, loved it.
Seamed like a reliable bike till One day, it fell of the stand, landed on the gear lever. Obviously the dogs weren't lined up, so it bent the shift fork instead,  rooted from falling off the side stand.

[Mick D]

What you have to be 100% sure of is that the engine cases are in good condition. If the two case halves are rooted, so are you.

Is there a way to do this without engine disassembly? Where do they wear/fail?
I've heard they can crack around the kick starter shaft.

Throwing a chain on these throws the transmission way out of sync.
The trouble then is The very vast majority of engine builders don't have a clue on anything much past an exploded view