snorkel removal
 

Right ....who has removed the snorkel from their xt and did it make much difference and will it need to be re-jetted afterwards,I ve searched the forums but not too much info on it....cheers

I removed the snorkel and opened the stock exhaust, thoose things combined gave it a little mere umf in the low end. It just felt like...well less restricted.


I got it on a dyno and it showed perfect air/fuel ratio, very even powercurve and 34,6hp on the wheel with a street tire.

Heres the dynochart:

http://peecee.dk/uploads/122009/xt600rulletest.jpg

Byw its a 2003 xt600e, and it had around 55.000km on the clock, with no enginework. Now it has just under 72.000 still untouched.

I've later added som things, made a "cover" for the opened airbox with a metalframe around the edge where the snorkel was mounted, and glued the metal cover you use over you're fryig fan, on the metalframe, to take the worst sand, little rocks, mud and so on.

It's actualle a thing bought from kedo, but it was to rough, the holes where to big, so i glued in the fryingpan thing which is much finer. Have no idea what that lid is called, hope you understand =)

Heres the item, a pic is worth a thusand words: KEDO - Product Details

You can make it yourself pretty easy, but you dont really need it, its just nice for me 'casue I ride a lot of sand and stuff.

I've taken the snorkel off me TTR600RE and to be honest, didn't really notice any difference?

I run a less restrictive end can & have jetted the primary carb from std (150) to 165, so it is a tad rich anyhow. It does stumble a bit at full throttle when flat out in high gear at + 60mph.

Visually, I can't see removing it can make a lot of difference to the air flow???? May be wrong though - and perhaps the TTR is a lot different?

Gonna try a smaller 155 and up the secondary carb from 145 to 150 soon.

removing mine didnt make any difference

Glad you asked this question, I too have have used the search function to find out more about this snorkel thing and how to remove it, well even what the thing looks like, after the input of some of the others I dont think I ill be bothering removing it now even if I still dont know what it looks like.

Cheers

Its under the seat, on top of the air box. Its a bit like a periscope - like on top of a submarine !!!!

The one on me TTR only reduced the intake size a bit, and was still had a volume greater than the intake area of the carbs.... so can't think it'd do much good.

Jens
was that dynotest done with standard jets & needles?

Yes, all stock bike, with snorkel removed, and the end of the exhaust taken out. :scooter:

They seem to be a tad rich from stock.

I was getting 47mpg (20km/l) when babying it a bit.

Iv'e now uned it up a tad, raised both needles, 2 up in idle jet, and 132,5 jet in the primary carb, and added versize downpipe from kedo, laser produro exhasut, piperx foamfilter, and im not getting much more than a tad over 40mpg.

Cant have it all i guess.

hi took mine off and noticed a little better performance:mchappy: put it this way id notice if it was off or on. standard filter. Slightly opened:rolleyes2: standard exhaust i think better with out but its just my humble opinion cheers

OK - slight revision to my original comment :rolleyes2:

I've left the 165 jet in the primary carb & put the SNORKEL back in, and it does seem to restrict it a "teeny weeny" bit :oops2:

I really need to get a 155 & 160 for the primary carb and a 150 & 155 for the secondary carb.

Anyone got some spares or have some part numbers as the jets are slightly different :confused1:

I removed mine last weekend, but can't report on the performance gains (if any). My bike is in pieces as I'm messing with the whole front end. I'll probably take it for one final spin before I winterize her, hope I can tell if removing did anything. I also feel like I need to get some sort of a screen or something just to keep the sand and such out of there.

Just a warning to all you fellows thinking of using a mesh or seive screen. I first did this in 85 to a XT550. The bike was second hand and missing the snorkel and I didn't click that it needed one.
The back wheel was throwing muck into the airbox and so I cut up a sieve and glued it over the opening. Result :thumbup1:A year or so later the bike started running horrendously. A helluva lot of money was spent on it trying to resolve the problem. Basically ended up with new ignition electrics and carb and the problem continued. Turned out the mesh had corroded ever so slightly. Hardly noticable really and I would not have found out had I not walked past another 550 missing a side panel and saw the snorkel and that the intake also ran accross the cdi and gubbins heat sink and thought that was a good idea and bought a snorkel. Voila! a £2.60 part in it's day versus the £400 in diagnostics and pointless replacements. :stormy:
You see the problem only ever manifested with the engine under load and half throttle and above. Not something easily done in a standard garage in those days. All meter tests etc had shown the bike was behaving within normal operational limits when clearly it wasn't. Changing a bikes design may give you instantaneous sattisfaction but the long run problems.............

Cheers Bruken,might just leave as standard....:thumbup1:

That reminds me ...
 

Ha - sounds familiar ... in the opposite sense for me. I have the 'wrong' seat on my '84 Tenéré, which presses on the snorkel ever so slightly. All fine until you crack open the throttle and she starts to really suck air ... at which point the snorkel caves in and cuts off the air supply. Cue the usual investigations of carb, ignition etc etc. Some calmer thinking about "what have I just changed?" revealed the problem. Solution - rip off the snorkel and chuck it in the bin - perfect. I rigged up a plastic shield under the seat to stop the back wheel throwing gunk straight into the airbox - seems to work fine: 2 years later, no evidence of any stuff in there that I wouldn't expect.

The only side effect for me is a slightly harsher note when going strong - you hear the intake noise pretty well, even above my (quite loud) exhaust.