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bikemadtim

Con rods - are they really that fragile?

8 posts in this topic

I run my XR650R on the road - supermoto'd. I have 15/45 gearing and ride it fast a lot of the time. I sometimes are near to top speed for a half a mile at a time (9/10ths of the rpm limit-no rev counter so don't know exactly) I change the oil every few hundred miles and genearlly look after the bike well.

People keep saying that the con rods are a weak point and that most people fit a carrillo rod. I thougt this bike was designed to win the Baja 1000, so wide open throttle across desert for mile after mile? surely a Honda con rod is up to it?

Be interested in your opinions guys?

Cheers

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An idea(though off target ref.con rods!!!) would be perhaps to gear it similar to mine.....38 back sprocket to keep those rev`s down....you`ll still have sharp acceleration too Tim.....you`ll be pleasantly surprised.....but....erm...then you`ll be going faster but still reving at the same rate.....oh sod it...just keep her lit...ride it like you stole it!!! :naughty::D:D:D:D:cry::D:D:p:p:D:D:naughty:

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I would think that Hondas con. rod will live a decent life.........IMO.. :naughty:

And Yes the XR650R has a few wins in the Baja 1000 under its tank... :naughty:

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I would think that Hondas con. rod will live a decent life.........IMO.. :naughty:

And Yes the XR650R has a few wins in the Baja 1000 under its tank... :naughty:

Hasn't the XR650R won the Baja 1000 every year since it was first introduced by Honda back in 2000?

This is the first time I have ever heard anything about the connecting rod being a weak point. I think there is some kind of confusion here.

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I think it becomes a weak link once you start building the engine for a serious power increase (i.e. 680cc, h/c piston, cam, porting, ignition, etc).

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Yes I agree with what has been said as surely the rev limiter keeps it from over revving and apart from jetting and airbox mods I have not altered the motor from standard. It's just I have read of 3 guys who have had big end bearings and con rods fail through over revving. They did have some engine mods done like different cams and one guy had a big bore kit.

So I can keep her pinned then and not worry?

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