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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by Lois Pryce, fueling up in Tunisia

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Photo of Lois Pryce, UK
fueling up in Tunisia



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  #1  
Old 18 Jun 2008
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CRD Absolute Power 2 for my '02 model.Bolt-on 100% and Stainless.A bit noisy for little villages and requires upjetting but if you just pootle along you'll probably be ok without.Mines for sale (hint, hint) when i get back to Blighty as my insurance won't allow it.
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  #2  
Old 18 Jun 2008
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lazer pro'duro can with motad downpipes on my '97 3TB, stainless throughout. ive heard the wheel/swingarm can hit the can on really rough roads, but i think thats rubbish as the two dont go anywhere near each other.
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  #3  
Old 19 Jun 2008
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stainless steel car and motorcycle exhausts - YAMAHA XT600 E (4PT1-7) 1995-04 SPORTS SYSTEM IN STAINLESS STEEL

Seems Ok to me

Ste
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  #4  
Old 20 Jun 2008
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Laser Pro dura is hit by brake caliper!

Hi,

I have fitted lazer pro'duro cans with motad downpipes on both my 1988 3AJ Tenere and my partners 1991 XT600E. Both have been heavily loaded with all our gear for our big trip, with their standard rear shocks set to max preload and both have rear caliper shaped dents in the underside of their silencers.

Another minus point for them is that although the outer case of the silencer is made of stainless steel, the inner baffles already had surface rust on them when I received them new. As a result I presume that the baffles are made of mild steel. If that is the case then they will rust away due to the exhaust waver vapour condensing in the silencer and other exhaust gasses dissolving in that water to make a corrosive liquid. Having said that, our systems have done about 60 000 miles and still seem OK, I assume that this is partly because the bikes are never used for short trips, so getting the silencer hot enough to drive off the condensation.


On the plus side, no re-jetting of the carb's was required and they are quiet (possibly too quiet for some, there is a race can option)

Mark
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  #5  
Old 28 Jun 2008
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Quote:
Originally Posted by Mark View Post
Hi,

I have fitted lazer pro'duro cans with motad downpipes on both my 1988 3AJ Tenere and my partners 1991 XT600E. Both have been heavily loaded with all our gear for our big trip, with their standard rear shocks set to max preload and both have rear caliper shaped dents in the underside of their silencer

Mark
hi mark, that is what ive heard but on my '97 they dont go anywhere near eachother, theres about an inch clearance even with the shock taken out. my can is offset to the right more than the original was, perhaps thats it but the bracket came from lazer with the can so i thought it was standard.
as to the rust, welding breaks down the intercrystaline structure between the iron chrome and nickel so you get dissimilar metal corrosion. the "stainless" exhausts on both my triumph and varadero have rusted, but nowhere near what a mild steel one wouldve done.

hi neil, yes they cost a lot brand new but i got mine 1/3price 2nd hand and i bought it because the oem had rotted out (like most of us?), not for performance or noise.

hi maria, my system is quite heavy but probably about the same or a bit lighter than the original.
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  #6  
Old 28 Jun 2008
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Dave,

Apologies if my message seemed like I was having a go. That wasn't my intent at all. Sometimes I like to take a different line than others just to encourage healthy discussion and debate. Yeah I know I'm sad!

I appreciate that sometimes riders are forced into this situation by rusting exhaust systems. I suppose that standard systems are not normally considered because genuine parts are always so damn expensive. We've all been there - a small bolt that costs £30 etc...

My main gripe is with those morons who ride around upsetting everybody with excessively loud (and unlawful) exhaust systems.

Us XT'ers must stick together...
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  #7  
Old 29 Jun 2008
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Talking

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Originally Posted by kentfallen View Post
Dave,

All for the sake of getting an extra 6 bhp WOW what a performance boost!

Us XT'ers must stick together...
My two pennies worth...

6 hp is actualy pretty significant, when you consider we are talking about a power increase of over 10%. Couple that with a good weight saving on a needlessly heavy part of the std bike, and the potential lifetime of a full stainless system and come replacement time, if you plan on keeping the bike, why would you not be tempted?

I agree, you have to go for the road legal baffled version, (which is what was on my XT when I bought her), but a significant weight saving AND a significant performance gain is a no brainer, if the cost is OK.

I also think that if you're looking to make modifications purely to get more power, you're better of buying a more powerfull bike to start with. KTM spring to mind...(But don't forget the AA membership!)
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Old 18 Aug 2008
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Originally Posted by kentfallen View Post
My main gripe is with those morons who ride around upsetting everybody with excessively loud (and unlawful) exhaust system.
Sir your total lack of any laws here in the United Kingdom astounds me. There is no law stating excessively loud exhaust systems are Unlawful there also is no legal requirement to have a BS kite on a silencer here in the UK and there is no legal noise limit for noise emmited from a silencer for road vehicles.
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  #9  
Old 29 Jun 2008
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Originally Posted by pottsy View Post
CRD Absolute Power 2 for my '02 model.Bolt-on 100% and Stainless.A bit noisy for little villages and requires upjetting but if you just pootle along you'll probably be ok without.Mines for sale (hint, hint) when i get back to Blighty as my insurance won't allow it.
I'm interested in that end can. Please PM price and pictures.
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  #10  
Old 9 Jul 2008
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I have the predator full stainless system (road legal) on my 2003 XT. I am not bothered about performance or weight saving, just wanted to have a rust fee alternative to the original system which is a rusty pile of crap. It sounds and looks miles better than the original and I was amazed at how heavy the original system was when I removed it. I would not get to excited about weight saving and performance on the XT as that is not what the old thumper is about, if I wanted that I would buy a cr250 or somehing like. The predator system is really nice and well worth the money, I do think I need to sort out the jetting though because she does tend to backfire sometimes.
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  #11  
Old 9 Jul 2008
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Originally Posted by Bonfireboy View Post
The predator system is really nice and well worth the money, I do think I need to sort out the jetting though because she does tend to backfire sometimes.
Pops a bit on the overun? Mine does too.

A plug check says the mixture is fine, I'm sure I read somewhere on here that there is a reason and a fix, but I can't find it again.

Carbs are not my thing!!
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  #12  
Old 11 Jul 2008
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I would really like to know of a fix. Predator says it should not need rejetting and I am not a mechanic. Some garage offered to fit a dynojet kit and mess around with it for £400 but I am not going for that!!! Any help would be great.
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  #13  
Old 11 Jul 2008
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It was something to do with the tickover, and how fuel keeps flowing when the throttle is closed. They don't all do it, do they?

I struggle with the search function on this website. Google seems to find answers on this site easier than it's own search does!

Let me know if you find anything, 'cos it annoys me too.

From Mikunu themselves. This explains the problem, but how do you adjust the idle air mixture screw? Trial end error?

Mikuni American Corporation

Check this out too:
KTM "popping" on deceleration - ADVrider

Last edited by angustoyou; 11 Jul 2008 at 20:02.
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  #14  
Old 11 Jul 2008
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Air mixture screw

You probably find on user manual position of idle mixture screw, it's under the carb, left, front. It's not very confortable to tune also, space for fingers is almost zero. Once that you found a practical system to screw it, turn clockwise writing down exactly how many turns it needed (say 2 and 3/4 for example). Now bring it back to original position and unscrew it half a turn, and test if popping\cracking problem is reduced.

Screw closed, all clockwise, lean mixture
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  #15  
Old 5 Sep 2010
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Quote:
Originally Posted by pottsy View Post
CRD Absolute Power 2 for my '02 model.Bolt-on 100% and Stainless.A bit noisy for little villages and requires upjetting but if you just pootle along you'll probably be ok without.Mines for sale (hint, hint) when i get back to Blighty as my insurance won't allow it.
Anyone know if CRD Absolute Power 2 is street legal in the UK?
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