Hi,
Ive got 2500km's on my 2011 now. I have noticed a vibration from the engine at 6k+ revs in 6th gear. The vibration is only noticeable at constant 6k+ revs and not when i am gunning her threw the gears.
I don't recall my 2007 having quite that much vibration. Is it just part of the running in process??

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It could just be a harmonic on your bike. Check the fairing bolts and exhaust system bolts for torque. More miles may smooth it out too.

Mad

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Thanx,

Hub, i was reading up on some of the old posts. Someone was complaining about vibrations at 2-3k revs. you suggested that he adjust his throttle sinc or something like that. I don't recall the exact terms (there is a lot of reading in the old posts). WTF does that mean?

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1. The sync is off.

You throttle bodies are not synchronized (balanced). They are not taking in equal amounts of air.

2. There are no plug-ins/tie ins to the wire harness of any kind.

No Power Commander or other wiring tapping into/interfacing with the main wiring harness.

3. The ECU may be acting up/slash/going south.

Your ECU may be functioning improperly.

The blending of both the low speed screws and the main throttle sync screw have to be check. We run 4 engines, but technically, we run twin engines if the sync is off. You can look at it as:

The screws of sync adjustment on the throttle bodies.

4 cylinders = 4 engines.

The left T body bores are connected inside(cylinders 1 and 2). The right T-body bores are connected inside (cylinders 2 and 3. When the throttle bodies are not synced, the left bank and the right bank are out of balance. They are two engines, each doing something slightly different than the other.

A. First, I sync both twin engines.

First try syncing the left two throttle bodies to the right two throttle bodies. The

B. Second, I sync the air screws to the twins side/slash/blend 4 cylinders as one sucking pulse. That balance says I suck this much vacuum of air, as will the next cylinder suck the same vacuum of air, we close down the pulse of one, increase the other until the balance is one, stinking, nasty, do not let the throttle blip when they say blip to upset the balance to see if shit, I hit the rev limiter... IT's so freak'inn balanced! Look out!

Sounds like Hub is describing T body sync. All 4 bores adjusted to flow equally.

C. Third is to eliminate a vibe. No, the vibe is still there after the sync.

If you sync your T-bodies and still have a vibe, you can eliminate the T-boddies as the source of the vibration.

D. 4th variable says I look for wheel balance @ 2 ~ 3k? It's not wheel balance.

Check wheel balance.

F. Chain hum-vibe. I did not resync link to chain. New pattern brings on hum/vibe.

Did you recently remove the chain and neglect to match the same link to the same tooth as were matched before. A new ware pattern starts. It does not flow with the old ware pattern.

G. Buzz. I have a PC/pig cutter. Ever since I installed it, she has this buzz through the bars about 2 ~ 3K.

Your PowerCommander or other piggyback device is causing the vibration.

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WOW, OK i sort of understand what u guys are saying. But that is wey beyond my capabilities for a DIY attempt. I can do the basics and manufacture items i need for my ride. But my capabilities do not include messing with the electronics or the fuel/air system. Thanx all the same.
I took her out on Sunday and observed what i called the engine vibration: It is not so much a vibration. More a vibration sound and tingle to my feet on the pegs and to my legs clamped to the tank.
Think it is something like the cam tension-er as Hub suggested and some more riding in needed.

One more question: And i don't want to bore anyone or start a debate because a lot has been said on this topic.
The start up cam tension-er noise. I don't like it and i don't want to live with it. It just sounds horrible, like i am breaking something in the engine.
WHAT IS THE BEST LONG TERM FIX FOR THIS PROBLEM.

Thanx.

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Install an APE manual tensioner or go with a modded ZX-12 automatic tensioner.

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ummm... Rook... you're about 2 years late on your reply :)

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Wouldn't be the first time this happenedLOL!Good lookin out though Rookster.... Wonder ifn he ever DID get that vibe sorted;)

* Last updated by: Grn14 on 3/9/2014 @ 12:04 AM *

Maybe he's just trying to hit 10,000 posts before his 5/6 year anniversary. lol

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LOL

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