Intake noise

[Hound]

When I got my Crosstourer delivered in December I expected the engine to be very much like the V4 in my ST1300 Pan European - quiet, smooth, turbine-like.

It's not. It snarls. It grunts. It howls. It suddenly becomes a missile with a handful of throttle. It's not smooth, but it's not rough either.

A lot of the difference is the intake noise. I never even noticed it on the Pan. But it's quite prominent on the CT.

So, now, the noob question: My bike has a K&N filter installed by the previous owner. With its greater airflow, would that contribute somewhat to that noise? Would the bike be a bit quieter with the HiPro filter I've bought?

It's a DCT, should that make any difference.

[Matlock]

I've always run an OEM filter on my Crosstourer, but a Yamaha TDM900 I used to have came with a K&N and I don't remember much difference in intake noise when I reverted to an OEM filter. I always use OEM filters on my bikes.
The Crosstourer does have a bit of a roar to it and a rawness when you give it a handful. A silky smooth V4 like the Pan, it ain't

[DE65Y]

Originally Posted by Hound

My bike has a K&N filter installed by the previous owner. With its greater airflow, would that contribute somewhat to that noise?

Yes

Originally Posted by Hound

Would the bike be a bit quieter with the HiPro filter I've bought?

If the HiPro filter is just an after market version of the standard then it should quieten it down.

Mine had K&N fitted when I bought it, so I don't know by how much it would be quieter.
You may also loose some of that poke you sound like you enjoy.

[Hound]

Thanks chaps. Since I've bought the HiFlo anyway, I'll fit it and see if the induction noise is reduced. I think it's pretty much a replica of the OEM filter. I doubt I'll lose anything in the performance that I could handle anyway!

I must be an old fuddy-duddy 'cos I want to make the bike as quiet as I can. No replacement exhausts for me...

I don't remember the 1200F having much intake noise either. No doubt all that fairing quietened things down.

I will embrace the rawness of the CT - but I'm still going to make and fit that fork tunnel deflector to help silence wind noise. 

[thetrecker]

Hi Hound,
The air intakes are on both sides roughly where your knees are ( swept in a rearward direction), maybe the K+N is making the difference or the helmet you wear is transmitting the noise up. I never had a K+N so don't know. On the topic of air filters, it seems always choked with dirt when I inspect at the recommended intervals so I have reduced the intervals and replace more often. Another option is a Delo brand from Louis.de at around €20 Euro.

Tom

[Hound]

Thanks Tom, I remember seeing those intakes when I lifted the tank to pass a cable through to the rear of the bike.



It will be interesting to see what state the K&N is in when I swap the filters. The bike's only done 9k so shouldn't be too bad.
I'll check out the DeLo - that's a new name to me.

You're possibly right about my helmet amplifying noise, it's a Shoei modular which isn't the quietest!

[Hound]

Interestingly, the VFR1200F (upon which the 1200X is based) shares the same airbox and filter, but has two white
plastic resonator bottles inside the airbox to reduce intake noise. The four snorkels are slightly different too.