So my CBR is experiencing some odd symptoms. It's jetted correctly and has a stock exhaust and airbox setup (with a K&N filter). However, whenever there is a heavy wind the thing bogs down like nobody's business. This usually only happens when I'm going 60mph+. Doesn't matter if I'm tucked in or not. I think it's because I'm missing this rubber guard that is supposed to shield the airbox and carbs from the engine. Does anybody have a picture of this? Bike Bandit has TWO pieces listed as "Heat Guard A" and "Heat Guard B" and I'm not sure which to request from the dealer.

 

I just changed the plugs on my bike and I dont remember seeing to pieces unless they join in the middle but i'll look again tomorow night when I get back to the house. I have a 96 600 F3 and from the part breakdown on bikebandit on the Frame picture it shows #6 Rubber, Heat Guard 609436 (68546-001). Which is what I remember seeing.

 

Yes this is your problem. I only have 1 heat guard though... guard A. not sure how important B is... hard to see what the hell it even looks like. That micro phish is horrible.

 

I found it on ebay: http://cgi.ebay.com/ebaymotors/ws/eB...T#ht_500wt_909

Looks like A attaches to the frame, and B attaches to that? How is your attached?

 

The big one just hooks onto the frame near the front of the frame and fits between the airbox and everything else. Not sure about the other.

 

It's because these bikes aren't designed to run with "ram air" and a proper gust can blow through there and muck up the pressure in the carbs.

 

yep, that and you are sucking in hot air off the engine, which lowers your HP.

 

Yep, just installed this. What a difference. My bike no longer bogs down on the highway and it actually continues accelerating past 100mph. It's a whole new bike now...

And for anybody searching this in the future, it attaches to one nub in the front of the frame above the fan, and also a nub to the left of the carbs, and it slides between the coils and the spark plug wires.

 

glade you got it done

 

In the most basic of senses... sure. In this situation, it's because it's allowing air to get forced up into the airbox, and air pressure can't be regulated. These carbs rely heavily upon pressure balance in order to work. If the pressure coming into the engine is greater than in the float bowls, it won't suck in fuel, and won't work.

That problem exists long before the horsepower loss of pulling warm air off the motor, especially in this situation. Let's also not forget that in a dynamic environment, your thought works fine. Carbs again relate entirely to pressure, and air movement to pull fuel. Warmer and colder air affects density, and affects the pressure, which affects the mixture... unlike in a fuel injected system where you get beyond that situation and run into how denser air allows you to dump more fuel in and still hit the magic ratio.