Query Approved.

Friends and fellow bulleteers, ur comments will be appreciated.

Have you checked it out with a qualified mechanic? There can be many causes for vibration:

- Tires
- Sprocket / Chain
- Engine Mounts
- Crankshaft bearings etc.

Likewise...many causes for noise as well

Thanks Gsferrari

@Enfielder
In one sentance, as microsoft says "its a feature, not a bug"!!!!
So get used to it !

I've ridden at least 3 bullets (including the thunderbird) in the past and just 2 days back a very good friend of mine bought a Thunderbird twin Spark (no he isnt a member of xBHP yet). I have ridden that too in the last two days and let me tell you, these bikes vibrate!!!

In fact his bike vibrates so much even at 3000 RPM that one can feel a pulsating feel in the front forks! We checked today and the rubber dampener between the engine fins had come off due to the vibes !!

But still there should be a few things you can do to minimise it. Make sure the engine is in top condition. One thing I'd say is check the engine oil. Also at idle, if you can kind of feel the piston going up and down, like it makes a 'guch guch' sound, that is an indication of low engine oil. Also since its a low revving engine anyway, you can change to a fully synthetic oil, that will help cool down the engine.

Also get the engine checked through a proper bullet mechanic. That shud smoothen things out.

Add extra coushoning to the seats.
Stiffen the rear shocks (not eniterely related to vibes, but will better the handling and you can take your mind off the vibes !! )

Cheers !!

Thanks Sukant for your valuable inputs.

Enfielder,

IIRC, you had some major issues with your 'bird sometime ago. Firstly have you resolved all the issues? If so, what was done? Stock RE Thunderbirds won't vibrate till 80 on the speedo. Only after that you'll feel the vibes. At 110+, life will become a blur.

Hi Jay, Thanks for your inputs

I did not pursue the old mechanic and went to other mechanic and got the servicing done. nothing major change has been done as the old mechanic had suggested. The problem of vibrartions existed that time too.

TBTS Vibrations

Hi Guys,
Just got a year ol thunderbird.. Done 15500 kms... I was researching the vibrations issue when i stumbled across this thread. I wasnt really sure how a thunderbird engine should feel...

I usually shift gears up around 2500-3200rpm, any more than that vibrations start creeping up the footpegs, by the time i cross 3500 rpm and rev up, its bone jarring.. Is this usual for a Thunderbird?

There must be some problem with the TB

Hi,
I had also bought a RE TB 2006 model and initially had a lot of problems of vibrations, and i use to feel i am sitting a heavy Generator. There was lots of issues with second hand bikes as most often the first owner had only ridden it without take care of it and when i comes to taking care most people sell it off. I had spend nearly 10,000/- on change of parts.

First the ball bearing of the front wheel needs to be looked and change.
Do the wheel alignment from a good mechanic, that is one of the reasons for vibrations.
For me i changed by rear tyres and my rear shock which was in the end position and 90% of the vibration is gone.
Lately my mechanic changed some ball bearing in the clutch plate box with rectangular ball bearing rather than the round one, my gear has become hard, but at even 100 i feel no vibrations, touched 80+ @3000rpm. Finding a reliable mechanic is the key. If the mechanic without trying says you need to change than he doesn't know his work. My mechanic always says let me try to repair. He does a lot of LEAD work and restricts me from buys the parts. If you are in Bangalore i will be happy to help.

Regards,
Amit (9945459772)

the enfield Tbird does vibrate a lot above 3700-4000 rpm.. The sweet zone is 2800-3500 rpm..

Btw as a suggestion/advise.. if the vibration is too much or abnormal and your bike has done above 15,000 kms or 20,000 kms, then best to get the oil pump shaft checked or changed even.

The maximum number of engine failures in the T-bird that i have seen are due to oil not being pumped properly, due to a worn out oil pump shaft. and as a regular item, replace it every 20,000 kms or so ( ~ 1200-1400 rs ), with the helical gear that rotates it. This will ensure proper oil pressure to the head/rockers, which will make sure that the vibes stay in check.