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XT660Z T�n�r� Tech Section Tyres, Mods, Luggage & Long distance preparation |
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DNA and Kev Mod with OE exhaust?
Presently struggling to persuade myself to part with a fairly large wad of cash for a replacement exhaust. But would much like the freely breathing engine that JMo and others have described resulting from fitting a decent exhaust, and DNA filter/airbox and either the Kev mod or a PCV.
How restrictive is the OE exhaust? Is there any point in doing the less expensive inlet-side mods, but leaving the standard exhaust as it is for now? Would this deliver any noticeable benefit? Or is there some glaringly obvious reason - maybe involving the cat - that I have missed, that makes this unwise or impossible? |
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OEM exhaust is NOT too restrictive. and if you keep the lambda sensor the cat should be fine.
have fun, j. |
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Giving the bike more air & fuel offers more gains then adding a exhaust by it's self. Fitting the DNA filters with a fuel mod will show good results on a standard exhaust system.
If you have the cash I always recommend fitting a PCV as this is the best fuelling device by far, for a less cashed up fuel mod there are a few to chose from these days. I know this thread is about the X&R but it has the same motor as the Z & the gains are very simular. http://xt660.com/showthread.php?t=4509
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Click here to join the XT Supporter's scheme Mods that I have done to my XTX's My 04 XTX Stage 1 & 2 DNA filters / Kev fuel mod / snorkel mod / Drilled air box mod / Engine breather mod / Fork Spacer mod / 15w fork oil / [ My 07 XTX Raptor 700 cylinder 102mm / Modified Crank Case to take a 105mm Raptor Cylinder / 11:1 102mm JE Raptor piston / Stage 1 Raptor Hot Cam / Ported head / Colder Spark Plug / +2mm Throttle body / DNA stage 1 & 2 filters / Modified Air Box / Snorkel removed / Worry Brothers stage 2 filter cover / 6mm & 8mm Bolts Replaced with Titanium Bolts / Recovered seat in Black / O2 Eliminator / My 09 XTX 59HP at the rear wheel / Stage 2 Raptor Hot Cam / DNA stage 3 Air Box / Carbon Can Exhausts / Modified Exhaust Link Pipes / PCIII With Custom Fuel Map / Wideband Commander O2 Data logger / LCD100 Dyno Jet display & fuel adjuster / 2500 OHM HT lead instead of a 10K OHM XT lead / Extra Coolant Cooler / Protaper Fat Bars / Tail Tidy With LED Tail Light / OKE Protection Knobs / LED indicators / AIS blocked / Modified rear sprocket rubbers / Rear Foot Pegs removed / 09 ECU With 02 Sensor Changed To A 06 ECU / Complete wiring harnes Changed from 09 to 04 / Home made LED resistor flasher / Hole drilled in the fuel tank filler neck to allow quicker filling / Modified Bar End Weights / Progressive front fork springs, 15W fork oil, forks lowered 25mm, used XTR rear links lowering the rear 20mm, rear spring one click stiffer / Changed front & rear guards from blue to black / 47T rear sprocket / Speedo Healer V4.0 / Kev throttle cam mod / Throttle grip mod / The new 2010 O2 sensor mod is out, works a treat, The new 2012 O2 Controller is out, PM me for details Now ride a 2018 MT09SP ABS + TCS My KTM 990 SMR Mod book. http://www.ktmsmt.com/viewtopic.php?f=13&t=4946 ![]() Last edited by Kev; 14-12-09 at 10:22. |
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Thanks Guys. Kev - looks to be some worthwhile gains to be had. I'll be giving this a try in the New Year, I think.
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Alan, the offer still stands if you want to have a go on mine you can then do a back to back test with yours so you will get an instant result for you.
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![]() ![]() ![]() Mods, Oxford heated grips, Givi Rack and top box, Stage 2 DNA filter and top, 02 sensor eliminator, Metal Mule taller screen, Seat hump trimmed off, .KEVS FUEL MOD (THE 1ST ONE FOR THE TENERE) , Extra fuse box, 12volt plug in socket, Zumo550 sat nav, , Barkbusters What Bill Clinton REALLY said to Monica Lewinsky was: "Sack my cook" Sadly Bike now sold 11/6/11 |
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A little off topic...
But I've just noticed the LeoVince cans are now down to �359 on ebay!!!
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>-------< Never underestimate the power of stupid people in large groups. ![]() ![]() ![]() |
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Quote:
Unless any other Somerset-ish members fancy a bit of a meet up/ride-out? |
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