“We are saddened to announce that due to concerns related to a potential conflict with a recently issued patent, S&S Cycle will stop production and sales of our Sidewinder 4” Big Bore Kits. Included in the production stop are part numbers 330-0576, 330-0577, 330-0578, 330-0579, 330-0580, 330-0581, 330-0582, 330-0583, 910-0596, 910-0597, 910-0598 and 910-0599. This action is effective December 22nd, 2017. S&S Cycle’s 106” , 107”, 117” and 124” big bore kits are not affected and will remain available for your performance engine demands.” S&S Cycle.
S&S Cycle Alert. Stopping Production And Sales of Steel Lined 4” Big Bore Kits in the USA
Published by December 22nd, 2017 in Customs, Editorial and Engines.19 Responses to “S&S Cycle Alert. Stopping Production And Sales of Steel Lined 4” Big Bore Kits in the USA”
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boring or overboring a vtwin for more power is almost a waste… It’s all in the STROKE!!!
Harley must have patented their 4″ bore bolt on cylinders.
Steel liners? Makes me wonder about the increased possibility of Sleeve an piston ring wear rate. Are either coated/plated/protected in any way to offset the disadvantages of steel, as a “wear” surface; as compared to cast iron cylinders/sleeves? Cast irons graphitic structure is considered a much better wear surface then steel, especially in the presence of high temps, high pressure and minimal lubricantion conditions. I’d be interested to know how they dealt with that issue.
EVER THING I HAVE GOT FROM S&S HAVE BEEN GREAT PRODUCTS .THIS IS MOST LIKELY DO TO A PATENT BY HD THANKS WILLIE
From my experience it is not possible to patent an existing production method that is currently being used.
Suzuki was able to patent the square four configuration engine. Clearly the design of Ariel motorcycles
As they had ceased production.
There is very little that is New in most patents anyway.
But who wants steel or iron sleeve bores when the advantages of chrome plated alloy bores is so enormous.
The model T against the space shuttle anyone?
Then again who is Dr pepper?
Can’t help but wonder who was actually producing this type cylinder package first ? Not just who bothered to get a patent.
Power/speed is in the bore smith custom within reason the old school stroker mentality is gone, lower piston speed = happy longer living motor granted harleys aren’t rpm motors but a good over square motor will beat a undersquare motor most of the time,
Another stupid fact maybe chevy patented the 4″ bore hahaha alot of small blocks had a 4″ bore gotta be more than bore size going on and as far as plated cylinder walls on harleys I never seen most hold up well as far as seal maybe air cooled to much to discuss here
i believe the production stoppage is due to abnormal wear in this particular product with no apparent explanation, don’t ask me how i know
rebel…SEE MY REMARKS ABOVE…Richards
richards is saying that S&S is lying about patent infringement? WTF?
Thanks everyone for chiming in, always entertaining to watch the commentary on CH.
We’re moving away from this product due to a potential conflict with a recent patent and for no other reason.
hacksaw…I did not say that! I said ” I’d be interested to know how they dealt with that issue”. I see S&S also commented with an explanation clarifying the original explanation was the correct explanation. Just for the record, I would still like to understand how they solved the potential wear problem I alluded to (if it’s not considered an industry/S&S propriatory information).
Well S&S we’re waiting to hear your explanation as to richards comment about wear and tear.
S&S never had the issues with the steel liner… The company that took the patent out however, did and does suffer from those issues. Although an argument could be made for the installation causing many of the problems people have experienced. The cylinder wall on the steel liners is about 1mm and is very susceptible to damage during install.
Someone who….I can see your point with respect to very thin walled liners being damaged/distorted at installation. Makes sense…On the other hand it raises more questions as to why such a delicate liner design for that kind of application; and doesn’t explain how they may have dealt with the adhesive (scuff) wear that I asked about. I guess it will remain a mystery in my tiny brain forever. Thanks for trying…
The question is to buy or not to buy???.Some places are selling old stock.Would you buy this product?
My question is to S&S why was it only the 110 big bore kit that was stopped??.Thanks