Restricted???

[Silverlegacy]

Hi All,


Is there an easy way to tell if a bikes restricted?
I have made previous threads on there about my bike feeling under powered and having a vibration around 5kRPM.
I have read that there could be restrictor washers in the inlet rubbers? but is this something that I can check with not a vast amount of technical know how.
I have check mounting bolts, carb sync and filters and things and everything else seems ok.
I just didnt want to start pulling lumps off my bike to find out im looking for something thats not there.
The bike is a 98 Model, its done in the region of 35K miles and been pretty well look after and serviced, its pretty much all standard bar a after market hugger and belly pan and screen.
Although i dont have contact with the previous owner to see if he had anything done to it or the owner before him?

[JoeRock]

You new to bikes mate? If you're not it will be feel like its restricted. Otherwise, best bet is to find a long private road and see what it'll run out of puff at - restricted bikes won't pull more than about 110mph tops, so if it goes past that you'll be alright!

[Paulfzs]

how fast will it go?


if itll do 90-95mph tops its restricted.

[Silverlegacy]

You new to bikes mate? If you're not it will be feel like its restricted. Otherwise, best bet is to find a long private road and see what it'll run out of puff at - restricted bikes won't pull more than about 110mph tops, so if it goes past that you'll be alright!

LOL, not new to bikes just trying to iron out the issues with my Fazer, I had a bit of a break from motorbikes after a crash, but had two fazers about 10 years ago and owned Bandits and  Honda X11 and various other bikes, but this just seems underpowered, once you get to 5k+rpm it just buzzes and vibrates a little and it feels like it needs to change up and ive never had it over 70mph (truth)
I've not ridden a smaller bike or restricted bike for years and years so dont if its a technical thing or if it is restricted and I just wasnt told.
Pretty sure air filter in good condition as checked it last week although i could think its clean and others might say its past its best.


Ive not pushed it overly hard as due to where i work and live theres not too many open roads, just feel un easy taking it on motorway due to how it feels

[Paulfzs]

5k buzzing happens with all fazers.

[Silverlegacy]

5k buzzing happens with all fazers.

whens it supposed to stop? as it seems to continue from 5k+ with no end?
Ive checked all the normal stuff and gone through other threads on here, running out of ideas?
unless its just -
A: how fazers are..
B: I'm rubbish at being a biker
C: Both

[darrsi]

Rather than top end, would it not run out of puff if you gave it a bit of welly from a standing start, or even sudden hard throttle in any gear?

[ChristoT]

Sorry, Darrsi, got to disagree.

The kit in my ZX4 made it pull OK, but ran out of puff top end. Best thing to do is find an open "private" road, take her up to a ton. If it still pulls, all good. If not, check your carbs.

[rhinoeli]

Spark plugs checked?

[taylor]

I agree with Christo,t, my bike got up to about 100. then end of, it goes quite a bit faster now though, :lol

[ChristoT]

With Yamaha's official kit, you can only do the ton in 4th. 5th if you're lucky. You should be able to do it in 6th, and still pulling.

[Silverlegacy]

Thanks for all the replies.
Will try and see if I can find somewhere I can open it up.
I could easily push my old bikes but this one just feels like it's making such an effort to get to 70. It cruises well at 40-50 in forth and fifth but not much further beyond that without feeling strange.
Half tempted to try and find somewhere local selling a Fazer to test ride another to compare.
Although it could still be me.

[midden]

With Yamaha's official kit, you can only do the ton in 4th. 5th if you're lucky. You should be able to do it in 6th, and still pulling.

Christo the way you use to whine about your restricted fazer I presumed it made for a shit ride not just that you couldn't go passed the ton  :groan [size=78%] [/size]

[darrsi]

Sorry, Darrsi, got to disagree.

The kit in my ZX4 made it pull OK, but ran out of puff top end. Best thing to do is find an open "private" road, take her up to a ton. If it still pulls, all good. If not, check your carbs.

It was just a theory,  I've never actually ridden a restricted bike before.

[noggythenog]

My tuppence worth random stab in the dark is....................could it be something to do with the throttle??, ie the throttle tube on the bar somehow slipping.


Are they standard fazer bars or renthals???



I dont know why ive thought of that......i think ive read a recent story about one of the thous that the guy had a hassle with the throttle which gave some dodgy symptoms suggesting more serious stuff but in the end that was all it was.


Does the throttle spin freely and snap back, does the bike rev to the limiter in neutral??? (Obviously not dvisable doing that loads of times but a little test wont harm it).

[Silverlegacy]

Bars are standard, all feels secure and throttle seems to operate like it should.
It's just the way the engine feels when it reaches 5-6k revs, like is almost redlining and the engines telling me it wants me to change up.
When I watch other Fazer videos on YouTube they seem to rev well above that without the same sound or buzz.
I've tried to eliminate as much as I can by checking various things and syncing carbs.
I've checked as many bolts as I can and had oil change and filter and also new chain and sprocket.

[darrsi]

Air filter would be the first port of call next.
Order a K&N, it's a worthy upgrade regardless if it's the cause anyway.

[clayt74]

Count the number of teeth on each sprocket, I know you say they have been replaced? But maybe if they were wrong in the first place maybe they got changed like for like

[Silverlegacy]

Air filter would be the first port of call next.
Order a K&N, it's a worthy upgrade regardless if it's the cause anyway.

I will have a little look around see what sort of prices there going for, not had much experience buying air filters but K&N seems to be the name that keeps cropping up.

Count the number of teeth on each sprocket, I know you say they have been replaced? But maybe if they were wrong in the first place maybe they got changed like for like

Will check this in a short while, although i think it was only the rear sprocket that was changed when the chain was done, i took off the cover to the front a while back while cleaning bike and it looked in pretty good condition but didnt look too new.

[Fazerider]

Is it running on all 4 cylinders?
If not, that might account for the vibration and lack of power.
Try changing the spark plugs... the condition of the old ones should tell you if the problem lies with one particular cylinder.