Hi Everyone,

I recently purchased a YZF750R (17th April), this is my ultimate bike and after 4 years of waiting, I'm still pinching myself as I can't believe I now own one!

It looks fast standing still and so far I am very pleased, however I have found a couple of problems

I get handlebar vibration above 80mph - wierd - could be wheel balancing?

Also how do I know without physically checking if the EXUP is working? Can it be felt working when accellerating?

I've also found I can't kick down the gears like on my old ZXR400 and CBR600. Going up gears without the clutch is a breeze, but coming down I have to blip the throttle or pull in the clutch.

Other than that an awesome bike, very pleased with my purchase.

Any hints and tips on how live / ride this bike would be greatly appreciated.

Sorry loads of questions on my first post, but just want to make sure it's all working okay.

a couple of pics, has Ohlins rear suspension too - don't know how to use it though.:duh

Nice bike and welcome to the forum... there are a bunch of 750 guy here as well.

Congrat's on your new bike!

cracking looking bike there mate, same colours as mine used to be,

exup either works or not you will know if it stops working because it wont rev past 4 or 5k rpm,

as for changing gear without the clutch you must be on awsome rider if your going that quick that you dont have time to use the clutch, its not a great way to treat your box in my humble opinion, and it doesnt help make your riding very smooth, never tried it on mine so should imagine its the same.

as for looking after it keep it serviced and go out an thrash it, keep an eye on the oil though cause the two engines ive had in mine use a drop or two (only when im caning the nuts off it though)

as for the vibration id get both wheels balanced first, my back needs doing an i notice that at about 40 mph, the other thing to do is to get a mate a steady and to hold the bike up on the side stand and back wheel and you can check for play in the wheel bearings and the head stock bearings, may well be worth checking all your suspension is set to factory settings to as somebody may have played with it in the past,

good bikes hope enjoy it and hope this post was useful.

Clutchless gear changes are very easy - going up, just quickly release the throttle and flick up a gear and accellerate - dead easy really, then to go down, just press down on the gear lever - learnt it from the UK mag RIDE.

May have found where the vibration is coming from - looking through old MOT certificates last night, from 2007 to 2008, the bike did 415 miles. From 2008 to 2009 the did 90 miles.

It was fitted with new tyres in 2008, so it's basically been sat in a shed for nearly 12 months on new rubber - I've been told this can cause flat spots. Will these disappear with regular use? I'm using the bike every day now.

Another wierd thing it does - starts without choke - quite happily too, if I apply any choke it dies - never seen this before.

Thanks for your comments mkz, your comments are useful, keep em coming. I've checked the rear wheel bearings and head stock, they're okay.

Getting the wheels / tyres checked on Saturday, will keep the forum posted with the results.

if you have a pair of paddock stands put th bike up on them a put piece of wood under the wheel so there is a few mm of space between wood an tyre and spin the wheel if there is a flat spot the the gap between the tyre an wood will get bigger or smaller as the wheel rotates.

as for starting without choke i shouldnt worry to much if it starts and runs ok then leave it be id say (if its not broken dont fix it)

i dont know if the tyres will get better or not but if they have got a flat spot id say time for a burnout, lol
or just put up with for as long as you can

Yeah totally agree with you on the choke issue -went to my local bike dealer and they said for £180 they would service the carbs, but it starts and runs without any issues.

Will try your suggestion on the rear wheel as I only have a rear paddock stand.

Another thing though, this bike sounds totally different to any other bike I have owned on tickover, sounds almost list a swiss watch - very mechanical - is this normal or just me worrying too much?

hold something over the exhaust on tickover just to baffle the noise if u think there is something not good going on leave enough space the exhaust gasses to escape though otherwise it will die,

as for a carb service sort an owners manual out an do it yourself. having thought about it there may be an issue with your air filter being old an full of shit so it might not be getting enough air in which could cause it run a bit rich hence the no choke on startup so it may be worth investing in a new one, personally id say either go kandn with it or yamaha origional on the air filter, the quality of some of the aftermarket ones are shit. if you go origional then your best bet is probably fowlers in bristol as they have the biggest stock in the uk for yamaha spares.

My bike wouldn't start this morning, so took the car - gutted.

Got home this evening, tried it, started first time.

So my mate and I took the tank off and checked the air filter tonight - I was told it was a new K & N - no it's not! Looks like no one's been under the tank for a long time.

The air filter was black, so given it a thorough clean and blasted the carbs with carb cleaner. We were going to remove the spark plugs, but we couldn't work out how to get to them - does anyone know? Even the Haynes manual doesn't cover spark plug removal, how wierd is that, it has a brief section on spark plug maintenance and that's it!

So we put everything back together and the bike fired up first time, ran it till the fan kicked in, sounds healthier now, just got to see if it fires up in the morning.

there is two routes in to the plugs one is tank off air box off then remove the plastic cover in front of the carbs you will need to unbolt the coils and disconnect the the throttle cables as well then you can get to the plugs under neath the other option is to remove both side panels and unbolt the rad and drop it down bit more awkward to get at that way though quicker when you get the hang of it.
lol my previous therory on the no choke thing could be right then sorry might have tempted fate there.

Wel it wouldn't start this morning, so called the garage, they have collected it.

I have asked fornew plugs and explained the situation, they said they will change the plugs to see if this rectifies it.

The mechanic is an ex Yamaha race mechanic, so it's in good hands.

Fingers crossed I get it back for Saturday. Still not taken it for a proper blast to see what it's capable of!!

ah right sounds fair make sure you find out what the problem was and keep us posted be interesting to know.

Got it back today - new plugs fitted, the old ones were incorrect.

The garage also did a compression check and found it to be low - told me it needs new shims and valve clearances checked. A 4-5 hour job costing somewhere in the region of £400 to £500.

Other than that the bike is fine, they told me that the new plugs may solve the starting problem, see how it goes.

Got a some more advice on my bike with it not starting and the low compression - I did some more investigation into what mileage my bike has done since 2002, bascially it's done approx 1400 per year for 3 years, then a year stood, then from 07-08 400 miles, and from 08-09 90 miles. The previous owner would start it once or twice a month in his shed.
Been told that the valves and engine are probably coked up, so put in fuel treatment and thrashed the bollocks off it, redlining every now and then - that was last night a 2 hour blast. Doing it again in the next couple of days.
Started first time this morning - choke still needs sorting though.
This bike is the fastest, most responsive thing I have ever ridden!!!

nice bike i hope you take care of it, and enjoy it as much aspossible,,,, :scooter