Hi fellas,

I read the Road Star gas mileage issues thread and Fatbike’s poor mans BAK solution really caught my attention, found it quite interesting, realize it’s not the real thing but what the heck, I’m not ready to spend many hundreds of $ on a real BAK system for now and neither for the near future for that matter, when it comes to these expensive mod, I’m an El Cheapo kinda guy! So I was wondering if the Fat Bak would be viable as a long term solution for my 1600?

Would it be feasible to do this considering that I have, for now, a V&H 2 into 2 Classic exhaust with a DJ kit, (don’t know what jet size they’ve used though) and stock air box, just need to add a K & N filter in there. Would rejetting be necessary, how much boost would I get out of this and would it be a wise thing to add a screen inside the four 1" holes to prevent bugs from entering the air box?

So do you guys think this move would be worth the effort or is this a completely far fetch idea for a long term solution?

Thanks for your advice.

RG

I drilled 4 - 1" holes in the front of the stock airbox on my bike for awhile when I added new pipes and rejeted. When I switched to the Barons Teardrop I didn't rejet but I did have to adjust the PMS a little. I did not notice any performance difference though. But, It does look nicer
If your trying to save money or like the look of the stock airbox I say go for it add a K&N and drill the front
Steven

i just did my stock air box. but i changed it alittle. i put three 1 inch hole in the front and three inch holes on the back. i did see it run better and the throttle respomce is better. im going to put a screen in there so bugs and stuff, so thats a good idea there..

hey roadgrabber, I'm doing mine tomorrow. I figure worse cash I can duck tape the hole's up . Check out this site for the filter's you might want to put in the hole's you drill. Cost about 8 buck's for 6 of them plus shipping

http://www.rockymountainatv.com/categoryDetail.do;jsessionid=B2122F032F996BF63A19F29EB1AA31E9.westring1?navType=category&navTitle=Filters&webCatId=27

Hey Sundance,

Those little round filters look neat but wouldn’t they reduce the air flow coming into the box, after all the idea is to get as much air as possible in there, isn’t it. Will you use them? I thought just adding a screen would do the job and facilitate the air flow.

Will you go with only 4 holes in the front like Fatbike’s original idea or 3 in the front and 3 in the back like speedy81304 did. Performance wise, it would seem that some saw a difference while others didn’t.

Keep us posted and good luck tomorrow with your project.

Thanks for your feedback guys, some more would be welcome.

RG

I drilled 4 .5" holes in the front of mine past the curve so you can't see them unless you really look. At a mile high I just wanted to get a bit more air going into the system. It seemed to help.Felt like better response. I have the 102 Yami cover and I like the way it looks so I don't want to change the box. My R* runs so freaking well I don't want to get into re-jetting or PMS .

OK, just finished and took her for a ride, has better throttle response. I didn't notice that anything need's to be adjusted as far as the carb. I guess when I get the box filter's I'll try them and maybe take the foam out if it make's a difference. I'll leave the insert in if for no other reason that a cosmetic one.

Man you’re lucky to be able to play with your bike like this with a nice 70°! I’m so envious!

It would seem the whole enterprise is worthwhile if only for the better throttle response, that’s great news especially for not having to rejet/adjust the darn carb. I presume you have the washable K&N YA-1699 model in there?

Think thebru idea of drilling four front ½" holes past the curve is not bad either.

Let us know how things work out with the box filters.

Ride safe.

RG

I have V&H longshot's and the carb was rejetted at that time. However, from what I am reading on this web site the rejetting may not have been necessary . I just returned from a run down the xway to see how it does at a high clip, same good new's, run's great with a lot of response.

hey roadgrabber, thought I'd send you a picture of the airbox with the inserts installed. I put two more holes in the rear of the box. It didn't seem to matter with/without the foam filters as far as performance.