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24 May 2006
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Registered Users
HUBB regular
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Join Date: Jun 2002
Location: ibadan, oyo state, nigeria
Posts: 57
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XR650R exaust pipe
Hi
I have been told that to drammaticaly improve the performance of this engine at low rpm one needs to change the exaust pipe with a specific after market replacement.
Is this true? If so which one is the best brand?
Many thanks in advance
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24 May 2006
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Registered Users
Veteran HUBBer
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Join Date: May 2002
Location: London, UK
Posts: 635
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the guy at PDQ (who tunes bikes for a living) used the stock can on his own bike so, for the European bike, I reckon its more about having the right silencer tip rather than changing the whole can. I'd expect Ozzie ones to be heavily restricted cos they supposedly only kick out 20hp compared with 45 over here.
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25 May 2006
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Registered Users
HUBB regular
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Join Date: Mar 2006
Location: Manchester, UK
Posts: 35
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Also think about opening up your airbox, but bear in mind that your carbs will need rejetting if you do either (or both) will probably only give you around 5 extra horses at best.
try www.4strokes.com
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3 Jun 2006
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Contributing Member
Veteran HUBBer
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Join Date: Jul 2005
Location: Wirral, England.
Posts: 5,673
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Depends on what model and restriction your bike has in place.
If its "uncorked", as in the restrictor in the airbox isnt present (brass coin thingy) then changing the tip to a racing tip helps allot.
Stock "uncorked" bikes run jets 65 pilot and 175 main. Check these !!!
If you take the baffle/tip out of the exhaust then up the pilot jet to a 68, it will start, run and blast like a dream.
for road use, many peopel drill holes into the airbox cover and cover with a fine mesh as it helps the engine breath quite a bit.
__________________
Did some trips.
Rode some bikes.
Fix them for a living.
Can't say anymore.
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Check the RAW segments; Grant, your HU host is on every month!
Episodes below to listen to while you, err, pretend to do something or other...
2020 Edition of Chris Scott's Adventure Motorcycling Handbook.
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What others say about HU...
"This site is the BIBLE for international bike travelers." Greg, Australia
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"My friend and I are planning a trip from Singapore to England... We found (the HU) site invaluable as an aid to planning and have based a lot of our purchases (bikes, riding gear, etc.) on what we have learned from this site." Phil, Australia
"I for one always had an adventurous spirit, but you and Susan lit the fire for my trip and I'll be forever grateful for what you two do to inspire others to just do it." Brent, USA
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Lots more comments here!
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by Graham Field
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New to Horizons Unlimited?
New to motorcycle travelling? New to the HU site? Confused? Too many options? It's really very simple - just 4 easy steps!
Horizons Unlimited was founded in 1997 by Grant and Susan Johnson following their journey around the world on a BMW R80G/S.
Read more about Grant & Susan's story
Membership - help keep us going!
Horizons Unlimited is not a big multi-national company, just two people who love motorcycle travel and have grown what started as a hobby in 1997 into a full time job (usually 8-10 hours per day and 7 days a week) and a labour of love. To keep it going and a roof over our heads, we run events all over the world with the help of volunteers; we sell inspirational and informative DVDs; we have a few selected advertisers; and we make a small amount from memberships.
You don't have to be a Member to come to an HU meeting, access the website, or ask questions on the HUBB. What you get for your membership contribution is our sincere gratitude, good karma and knowing that you're helping to keep the motorcycle travel dream alive. Contributing Members and Gold Members do get additional features on the HUBB. Here's a list of all the Member benefits on the HUBB.
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