ESE's works engine tuner

[Frits Overmars]

Someone with less manners than me would mutter helical gears have no place on a racebike.. ....

I agree, but I doubt it was the reason the clutch basket was destroyed.

[husaberg]

I agree, but I doubt that was the reason the clutch basket was destroyed.

Yeah fair enough, although it wasn't my thought that it was the cause, I will defend it anyway, thinking about it as they side load the bearing it must place some on the hub also if well when the bearing does start to fail as well.
My moneys on 30 plus year of stress and metal fatigue handing far additional stress than the 12hp and 5 year service life envisaged by Suzuki.

There appears to be a lot of localised wear in the tangs of the plates i can see the appears to be huge amounts of stress raising sharp edges on the debris. These baskets are made from basic casting not designed for stress involved in race engines. they often have more meat in areas where they don't need additional material and a lack of decent radii and meat in areas where the basket goes from basket to the hub.

I don't recall how Suzuki mounts the gears but I assume its pressed in rivets like Honda these often also wear over time creating additional stress.

TLDR The design ethos that placed quietness of primary gears as a priority over power efficiency flowed through to having a part that was not designed for year after year years of up and down race changes with 3x the design hp.

[Frank S.]

... just too much power 😂
I think the part was stressed a lot over
its intended capabilities and so fatigue
comes into play.

You could try to reinforce the clutch basket
with a thin steel ring.

[Frank S.]

You could reinforce it like this

[diesel pig]

You could reinforce it like this

I can back that up. As I had a engine that just lost one finger of a clutch basket and did that exact thing to my next basket and had no more problems.

[TZ350]

Someone with less manners than me would mutter helical gears have no place on a racebike.. I thought you had replaced these a while back....

I agree about the helical gears. My own bike has straight cut from a Honda or was it a Kawasaki???. It was the primary gear nut on this engine coming loose and allowing the helical primary gear to chew the clutch basket fingers off.

Someone turned up with a 50cc Scooter the other day.



Makes our 12-14 rwhp RG50's look tame.

[Flettner]

This one is nice, a twin version would be just the berries
https://www.facebook.com/share/p/17FM6Wednu/

[husaberg]

I agree about the helical gears. My own bike has straight cut from a Honda or was it a Kawasaki???. It was the primary gear nut on this engine coming loose and allowing the helical primary gear to chew the clutch basket fingers off.

Someone turned up with a 50cc Scooter the other day.



Makes our 12-14 rwhp RG50's look tame.

i hadnt considered that as the tab was in place or in this case maybe 2x tabs?
Shouldn't that one tighten up in service? rather than loosen?

[diesel pig]

This one is nice, a twin version would be just the berries
https://www.facebook.com/share/p/17FM6Wednu/

That is very cool. Good to see work is still going on with 2T's not just in dirt bikes.