• Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

interesting results on the dyno - sm610

What about the Yamaha wr450f? That is only 450cc yet it puts out damn near 60hp:

http://www.motorcyclespecs.co.za/model/yamaha/yamaha_wr450f 03.htm

That is a 2003 model as well so it's not massively cutting edge.

Also I wanted to revisit this thread to ask was it ever determined whether the 610 was 45 RWHP or 45 BHP? Because 45 BHP would be pitiful...

Another thing, from reading car and motorbike forums over the years it appears that carbs are easy to tune for more power.

So enough of all of this new school JD Power tuner BS, how can I tune the 610's DelLorto carburettor for more power? I have read about changing jet needles but before I do that I know I can adjust the mixture screw.

The manual doesn't say anything about the mixture screw in the "settings and adjustments" section:

Untitled.png

Also what's the deal with the spark plug gap? I have searched on here but no threads come up on that, I have a healthy spark but the gap is around 4.5mm, not the 6-7mm that the manual recommends. I am gonna pull the plug and have a look at it's condition.
 
Flynn said:
What about the Yamaha wr450f? That is only 450cc yet it puts out damn near 60hp:

http://www.motorcyclespecs.co.za/model/yamaha/yamaha_wr450f 03.htm

That is a 2003 model as well so it's not massively cutting edge.

Also I wanted to revisit this thread to ask was it ever determined whether the 610 was 45 RWHP or 45 BHP? Because 45 BHP would be pitiful...

Another thing, from reading car and motorbike forums over the years it appears that carbs are easy to tune for more power.

So enough of all of this new school JD Power tuner BS, how can I tune the 610's DelLorto carburettor for more power? I have read about changing jet needles but before I do that I know I can adjust the mixture screw.

The manual doesn't say anything about the mixture screw in the "settings and adjustments" section:
Click to expand...
You should already know that an engine is basically just an air pump. The fuel used is limited by how much air your engine can pump and that limits how much power can be made. Im sorry if im telling you how to suck eggs, its just not as simple as add more fuel - get more power, unless your fueling is already poorly tuned
Youve got to find a way of moving more air - hotter cams, higher revs, more ccs, bigger valves, flowed head, maybe even forced induction - http://www.cafehusky.com/threads/my-sm-610-ie-with-some-more.78634/#post-509881
 
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