Specifications on 500 rod

[Husq.fleet]

Anyone have the specifications for a 500 connecting rod? I may have found a source to make some in small quanities, most want 1500 minimum quanity order. May have to tear my good one down to get specs. if none found. Any interest in a rod kit if I can get it done? I need one for my 83 XC500 and haven't had much luck. I talked to Euro-Rods last summer and they had a backorders for almost 50 and were getting bids on having some made. They were running into the minimum quanity thing and as the last time I contacted them they still hadn't found a new source. Thanks in advance Scott

 

[1983XC175]

As of last week, Euro rods had no husky rods in stock..

Anyone have the specifications for a 500 connecting rod? I may have found a source to make some in small quanities, most want 1500 minimum quanity order. May have to tear my good one down to get specs. if none found. Any interest in a rod kit if I can get it done? I need one for my 83 XC500 and haven't had much luck. I talked to Euro-Rods last summer and they had a backorders for almost 50 and were getting bids on having some made. They were running into the minimum quanity thing and as the last time I contacted them they still hadn't found a new source. Thanks in advance Scott

 

[fran...k.]

I take it places like Hall's can't help sell you a rod kit. We are talking rod pin cage and rollers. I do have a crank I had pressed apart with the intention of capping the holes and filling over the notches and adding weight to the other side but lost interest. The automatic bikes have a shorter pin, I think the pin is the same for smaller displacement bikes sure looks the same as a 430 pin. The 87-88 rods for all the two strokes are different in that they are more I beam than popsicle stick and are scalloped at the wristpin. I guess most stuff now has a slot at the wristpin. Too bad you missed out there were a lot of new old stock crankshafts on eBay a few years ago. Used ones with snapped off electrical side bolt or ones from the early mono shock bikes which destroyed the cases might be an option for a few more years until they are recycled. With the BMW roller cranks they used to fit minutely different sized rollers to get a perfect fit. The Harley experts can tell you when Harley stopped building cranks this way. I don't know what center less grinding means but one machinist I met seemed to think it wasn't a big deal to do stuff with rollers of this type. So perhaps if the rod and pin aren't trashed they could be rebuilt. Bley still comes up in a Google search at least in some vintage BMW stuff.

Fran

 

[ruwfo]

500 rod is offset

From what i remember, i read the 500 rod is offset, so that's what
makes it different then the 430.

I tossed a bad 500 crank/rod a month or so ago , just remember you have to be careful measuring old parts as i was told
big bore 2 stroke can stretch there rods .

I know Halls don't have any 500 rods kit, as i called them back in Nov.

Try calling Rick Horvat, i know he's usually stock 500 pistons & cylinder!

Husky John

 

[fran...k.]

The 500 rod is longer and has a bigger hole at the wristpin. I doubt it is offset in any fashion. Sometimes the pin in the piston is offset perhaps that is what you had in mind never paid any attention to that.

Fran

 

[Abelma]

It would be interesting and useful if somebody can measure a rod, with exact measurement.
Abel

 

[Husq.fleet]

It would be interesting and useful if somebody can measure a rod, with exact measurement.
Abel

I started tearing down my 500 engine tonight. Hope to get rod to my friends machine shop next week. He has a rod centering fixture for measuring.

 

[Abelma]

I started tearing down my 500 engine tonight. Hope to get rod to my friends machine shop next week. He has a rod centering fixture for measuring.

Excellent !...Remember to measure the weight also

 

[Husq.fleet]

Excellent !...Remember to measure the weight also

We definatly will! With this project we are going to try to "rebalance" the engine to get rid of the vision blurring vibration. Might look at the rod ratio also and he was talking also about an offset pin to make the stroke longer.

 

[Abelma]

Good! Offset pin ? That should do more with the position of the pin on the crank. The rod is like straight connection line between the eyes . You are increasing the stroke, that will give your more cc capacity, but also, it will change the transfert ports configuration..warning about that

 

[Abelma]

I had a ride in a 1983 CR500 model, and really low vibration. May be it was fixed that problem? Or it is normal that vibration on that year?

 

[fran...k.]

roller diam 0.137"
roller length 0.501" + - may have pins on end
cage width 0.616"
cage id 1.004" + -
cage od 1.253" + -
pin od 0.986"
hole through pin 0.398" it is not solid
pin length 2.284
wristpin lube hole 0.118"
wristpin id 0.945
big end hole 1.263"
inside wristpin hole to inside big end hole 4.610"
4.610 +(.945/2)+(1.263/2)= 5.696" center to center of holes
Wristpin hole thickness 0.160" varies
0.293"x1.063" dimensions at appox center of rod
wristpin hole depth 0.867"
thickness at big end hole varies but not much 0.237"
big end hole depth 0.628
oil cut outs (4 per side) approx 1/4" unknown radius

This should give you enough so you can go and see if a kx 500 rod kit or one from a Suzuki 500 quad or something else similar could be made to work. Myself I would go to the bone pile, send it off to Bley vintage or some other similar place as most all old motorcycles have roller cranks and folks restore them. Or think about getting some sets of rollers made up and figuring out how to get the cage apart or make new cages like Bley did when I talked with them. Though the dirt bike crowd doesn't seem to care the true restoration shops are pretty fussy about the interference fit of the pin in the hole it goes in and don't think a re pressed together vintage set up grips like it once did. That is what I found out years ago and went back to the bone pile route.

Upon further examining it kind of seems that the cage is what wears the parts more than the rollers. Over half of the rod is rubbed by the cage, less contact area on the pin.

Fran

 

[fran...k.]

I had a ride in a 1983 CR500 model, and really low vibration. May be it was fixed that problem? Or it is normal that vibration on that year?

Maybe they put in the later crank and the later piston.
You can't really ballance these things in the primary balance just break it up into up and down and fore and aft components, balance factor.

 

[Abelma]

Excellent Frank !

 

[Leftcoast leftkicker]

Somewhat off topic but back in the early '80s Mitch Payton made a 470 kit for the 430 (Harry Klem was the guy who actually did it) that used a Yamaha rod and piston (?) w/pin relocated + all sorts of head work. I only saw one small article on it from '82 MXA I think (more like a side bar) but of course had to have it so I tracked Harry down and he was going to build one but couldn't find the specs. He actually called Mitch & they had a good laugh becuase Mitch (who keeps everything) couldn't find the specs either. Oh well.

 

[Abelma]

Hi Frank. Please see my last add here:
http://www.cafehusky.com/forums/showthread.php?p=74518#post74518

 

[Husq.fleet]

Thanks alot Fran. I got the rod specs for everything that Wiseco makes last night. From your measurments I'll see if anything comes close. From your pictures the one on the left looks alot lighter-is it rom a waterpumper? I know my lower end/ piston from my 87 430 is lighter than my air-cooled 430? If we have to make a different crank pin or anything else my friend can do it, including the heat treating. I got the crank out of my 500 last night and will press it apart today to see what is exactly wrong with it. I bought it this way, it had been sitting since 88-89. Thanks, Scott

 

[Husq.fleet]

In pressing the crank apart. Is it ok to press pin through crank half? Or should I fab. a plate to press halves off of pin so any damage to pin wont damage crank halves? Thanks Scott

 

[fran...k.]

Yes it is out of a water pump engine. I don't play the serial number game but it was in an 85-86 frame and had the extra bolt on the clutch cover. The rod appears to be the same as the earlier ones. I know I have a 500 auto crank as well but just couldn't find it that rod looks the same but the pin is shorter. That last one the 1988 crank I bought off ebay for the collection, they omitted the lube hole and it has a bad big end bearing.

I can't say as to the husky crank I paid a guy to press mine apart and stayed in the parking lot. The vingage BMW cranks are done with a fixture removing the pin from the hole from each side. Perhaps someone else will know what the dirt bike guy do.

Fran

 

[Husq.fleet]

Somewhat off topic but back in the early '80s Mitch Payton made a 470 kit for the 430 (Harry Klem was the guy who actually did it) that used a Yamaha rod and piston (?) w/pin relocated + all sorts of head work. I only saw one small article on it from '82 MXA I think (more like a side bar) but of course had to have it so I tracked Harry down and he was going to build one but couldn't find the specs. He actually called Mitch & they had a good laugh becuase Mitch (who keeps everything) couldn't find the specs either. Oh well.

Lefty- A kid I raced with in the mid eighties had a 82 430CR He had someone-well his dad did, in Seattle go through the engine when it was fairly new. They used a modified Porche (sp) piston in it. That thing would eat my 80-OR390 with a 420 kit in alive. He parked it doing the family thing then sold it a few years ago-missed that one. He just got it back from who he sold it to-siezed. He has been wanting me to come look at it because he wants to restore it. It may have a big bore kit in it for all I know and he doesnt remember anything about it other than the Porche piston. Its on my to-do list, little higher now that it has my curiosity.