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Senior Member
I am also adding to my possible list the AC Racing full exhaust. Does anyone have one and have any input? Not looking for other options on this post-just a simple input on this pipe.
Also, is it difficult to jet the 400? Do you need to take the carb off?
Senior Member
as far as i know, with everybike you have to take the carb off to jet, the ex requires the plastic and airbox to be removed to get the carb off, i have not seen anyone with the ac system though.
2000 400EX -
AC Propeg Nerfs, Pro Taper SE Bars, ASV Levers with Dust covers, Mod Quad Billet Shifer and Brake Levers, AC Swinger Skid, 22-9-10 Dune Trackers, 21-11-8 Sand Geckos, ITP Wheels. (Building)
'89 Toyota 4x4 Longbed - 5 Speed, 36" Swamper SX's, "Custom" cab, 4 Inch Trailmaster Suspension, 3 Inch Body, Headache Rack... Etc, etc.
Senior Member
Thanks. I have done a search but found nothing on the AC. The dealer I know claims great gains with this full system and I like the appeal of an exhaust that is not on every atv.
Senior Member
fpund out, About +10 Torque/hpOriginally posted by rinaldi
Thanks. I have done a search but found nothing on the AC. The dealer I know claims great gains with this full system and I like the appeal of an exhaust that is not on every atv.
2000 400EX -
AC Propeg Nerfs, Pro Taper SE Bars, ASV Levers with Dust covers, Mod Quad Billet Shifer and Brake Levers, AC Swinger Skid, 22-9-10 Dune Trackers, 21-11-8 Sand Geckos, ITP Wheels. (Building)
'89 Toyota 4x4 Longbed - 5 Speed, 36" Swamper SX's, "Custom" cab, 4 Inch Trailmaster Suspension, 3 Inch Body, Headache Rack... Etc, etc.
Senior Member
I know the mfg makes that claim. What is the avg HP of a stock 400? I have an 06.
Senior Member
~29hpOriginally posted by rinaldi
I know the mfg makes that claim. What is the avg HP of a stock 400? I have an 06.
2000 400EX -
AC Propeg Nerfs, Pro Taper SE Bars, ASV Levers with Dust covers, Mod Quad Billet Shifer and Brake Levers, AC Swinger Skid, 22-9-10 Dune Trackers, 21-11-8 Sand Geckos, ITP Wheels. (Building)
'89 Toyota 4x4 Longbed - 5 Speed, 36" Swamper SX's, "Custom" cab, 4 Inch Trailmaster Suspension, 3 Inch Body, Headache Rack... Etc, etc.
Code Red Racing #23
you wont see that much easily on a 400. that is 1/3 the total hp. i would expect to get 2-3 hp. Steve
2019 Maverick X3 XDS Turbo R
2003 TRX 400EX
2016 HONDA RANCHER
I would say average for a good exhaust is 5-10% increase.
Senior Member
One thing ya will learn with a MFG is they take the low, mid and top end HP gains and add them together to make it sound bigger.
2008 TRX400EX
Some go fast parts and look cool stuff added.
balls to the wall
ac exhaust are 101 DB
01 416ex, Hotcams Stage 2, Spal Fan, Jardine Slipon, CRF 450 Timing Chain, 450 Carb, Uni Air Filter and cfm air box, cfm oil tank, Fly Handlebars with Odi Grips, Magura Clutch, Nerfbars, 14/38 Gearing
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