[William Martin]

Not to be a spoilsport, but you should not run that thing until it’s repaired…it could take your elbow off if it were to finish destroying itself at high rpm!

 

[William Martin]

Looks good…but a few explanations would be helpful. How do the setups differ in “personality” as you put it?

Also, it would be helpful if there was a way to change to “English” units for the input values…:-) We don’t all live in Metric-Land!

 

Regards,

Bill

[William Martin]

Temperature of the air your engine is “breathing”, so room temp is as close as you will get.

[William Martin]

<div class=”d4p-bbp-quote-title”>Charles Skowron wrote:</div>
There really isn’t any ideal year for the CR80 because, from what I’ve read here before the engine went virtually unchanged from 1986-2003. If that’s true,

<snip

>

Not true…1986 thru about 1999 had smaller transfer ports than the 2000-up models. Oddly, the pre-1986 engines also had the bigger transfer ports.

[William Martin]

Big rubber hammer?  hehe

 

[William Martin]

Have you checked the wheel(s) for possible damage? If not the axle…that’s the next likely thing that may be bent.

[William Martin]

Walt, excellent choice of bearing. Have the NTN equivalent I first installed in 1998 on my current kart…still quiet and tight.

 

[William Martin]

[quote quote=5742]belt drive is the cure for that.. has anyone ever built a belt drive?[/quote]

It’s common in road racing, not in sprints though. Sprint kart tracks are kind of tough on a tooth belt drive. I tried it years ago, but it kept getting tire rubber stuck in the pulley teeth, then it rips the teeth off the belt…shame it didn’t work better, kart was always clean, no chain lube mess.

 

[William Martin]

Thanks everyone for the feedback. Will try some adjustments based around neutral camber & see what happens.

 

[William Martin]

[quote quote=5275]Karts already have negative camber built in so your neutral setting will yield some negative camber. Your tires will always wear more on the inside edge.[/quote]

By comparison with some other karts on the same track, this was kind of gross. I was just wondering about the effect of track grip level on what the desired camber setting might be…

 

[William Martin]

[quote quote=5256]Is the track mainly right hand turns? How does the tread look (does it look like long wavy grains in the tire)? Does it look or feel like it is understeering? Too much negative camber can cause some understeer on the exit of the turn – but I find that I always use a little bit of negative camber. Did you get a chance to check the tire pressures on all 4 tires? Ray

<hr />

<div class=”bbp-reply-signature”>“Karting expert since 2014″</div>
[/quote]

Yes, mostly right hand turns. I expected some extra wear on the left front, but not this much… It was sliding a lot more than I liked, due to downhill turns. Maybe need some skiing lessons! Tire pressures were “normal”, whatever that means.

[William Martin]

[quote quote=5163]This cylinder I have came with a motor I bought 5 yrs ago, I thought , what the heck, put a piston in it and see what it does. I did not bother to put new reeds in it. Upon inspection of the reeds, one of them has small break forming on the top edge. When I bought this motor, it came with a set of reeds with a stiffener, I assume these would be high tension reeds. The next time I go out, I will try these reeds, see if it makes a difference, I have an extra reed cage that I have already mounted a set of new low tension reeds. Gary #55 Honda CR80 [/quote]

Sounds like a plan…good luck.

-bill

 

[William Martin]

It’s probably not the reeds. My first “GUESS” is that your transfers are too big to get the flow velocity needed. It seems counter-intuitive, but ports can be too big…

-bill

 

[William Martin]

That’s sun/air exposure. Keeping them in a dark sealed bag helps the “shelf life” quite a bit. Personally, I would not put them on the track…but I do use them on my kart stand!

-bill

 

[William Martin]

Just as an aside, info directly from the originator (Walt Meyers) of the foam collars in karting: It’s to protect against helmets hitting and breaking the collarbone. It never has been for “neck protection”.

[Author]

Posts