04-09 YAMAHA YFZ450: Big Gun Rev Box (BLACK)

04-13 YAMAHA YFZ450: Big Gun Eco System Slip-On Exhaust

09-13 YAMAHA YFZ450R: Big Gun TFI Power Box

Big Gun Rev Box CDI/ECU Honda CRF450R CRF 450R 02-03

04-13 YAMAHA YFZ450: Big Gun Evo R Complete Exhaust (ALUMINUM)

09-13 YAMAHA YFZ450R: Big Gun Eco System Slip-On Exhaust

2009 Yamaha YFZ450R EVO R Full System, Manufacturer: Big Gun, EVO R CS YFZ450R/X 09-12

Big Gun EVO R Slip-On , Material: Aluminum 09-24602

4 Wheel ATV Action Magazine, Volume 22, Number 2 (February, 2005)

NGK 7162 Spark Plug

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Yfz 450 Big Gun Popular Q&A

Q: What is the best big bore kit for a yfz 450?
A: Athena or JSR . stay away from Ice Cube cylinders. Read More »

Q: Does GYTR make a big bore kit for an o7 yfz 450?
A: Yes, GYTR does make a big bore kit for the YFZ 450. It is very Read More »

Q: Big bore kit for a 04 yfz 450?
A: i like Trinity's big bore kit, yfz 480, the big bore kits are in the 800-900 range for average, for a normal rebuild is in the 750-900 range for most 4 wheelers... Read More »

Q: My yfz 450 is backfiring on deacceleration and if i gun it and le...
A: Mine is doing the same thing right now. I pulled the valve cover and checked the valve clearance and I am good there. I did notice that the spark plug was a lit... Read More »

Q: I want my own quad know and want to know if im too small for a 40...
A: Im 5'8 as well and a 250 is a little small to me. Go with a 450 as it will last you longer and you wont outgrow it. Read More »