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Gearbox oil additives (Nulon)

Gearbox oil additives (Nulon)

RossW
4 years ago

2019 Sport Glide
So despite the dealer telling me it's nothing to worry about, I am a little concerned about the clunking noises my gearbox makes on changes.
I thought at first it was just my poor technique, being used to a dry clutch Moto Guzzi, that needed some clutch feathering to line up the dogs, but even with taking time on shifts and using all of the clutch, it audibly clunks into gear.

I've had a suggestion that adding a tube of Nulon G70 (or similar) to the gearbox improves matters, but I'm concerned that the teflon will lead to gumming up of things (Wasn't recommended in the Moto Guzzi for this reason).

Has anyone (other than people who work for Nulon) tried these additives?
Did it help?
Did you regret it later when you found all the internals of your gearbox stuck together or did a rebuild and had trouble removing it?

RossW
4 years ago

It currently has whatever Frasers put in it at the first service. They didn't tell me what they used, I presume they followed the recommendation of the owners manual, which would either be the Syn3 synthetic or the Formula+ Transmission and Primary Chaincase Lubricant.
There is a warning in the manual not to mix the two, so I guess that before filling with something else, it would be a good idea to drain it pretty thoroughly.
I used to use Penrite 75W/90 in my Moto Guzzi and I still have a bottle there somewhere.

My apologies. I seem to have turned this into an oil thread.

RossW
4 years ago

That last bit is kind of what's holding me back from using the additive.

tussuck
4 years ago

Then in that case just skip all the chit oils and go straight to Red Line Shock Proof

paulybronco
4 years ago

Quoting tussuck on 17 Jun 2020 05:35 AM
Then in that case just skip all the chit oils and go straight to Red Line Shock Proof

Hallelujah brother......good stuff that liquid strawberry. My box still bangs and clunks though with it but the shift action is certainly better in my view.

Baloffski
4 years ago

Don't think Ross was around when we all did the praise on Redline. Shifts are smoother PB, most definitely.

Birtyyy
4 years ago

Quoting Baloffski on 17 Jun 2020 07:03 PM
Don't think Ross was around when we all did the praise on Redline. Shifts are smoother PB, most definitely.

I wasn't either but I just went and did a search of old threads, I'll definitely be looking for a local supplier when I do my next service.

tussuck
4 years ago

Quoting Baloffski on 17 Jun 2020 07:03 PM
Don't think Ross was around when we all did the praise on Redline. Shifts are smoother PB, most definitely.

Quoting Birtyyy on 18 Jun 2020 01:33 AM
I wasn't either but I just went and did a search of old threads, I'll definitely be looking for a local supplier when I do my next service.

Its a CHIT to find.... Bursons claim to stock it but they are generally full of shit.
I ALWAYS buy mine from eBay nowadays (i think a place in Syd sells it)

wildchild
4 years ago

I have been using Spectro in the Transmission and Primary for over ten years, slight clunk when cold but smooth as silk when warm and shifting into neutral is spot on easy.
Anybody else using Spectro that can chime with comments?

Baloffski
4 years ago

Spectro, I personally havent heard of it.
looking up now. But is smooth and, I mean red shit is , has beeb so good, , thanks for that brother.
Looking into iy now, and maybe a laughing clown, but ah.

wildchild
4 years ago

Quoting Baloffski on 20 Jun 2020 08:08 AM
Spectro, I personally havent heard of it.
looking up now. But is smooth and, I mean red shit is , has beeb so good, , thanks for that brother.
Looking into iy now, and maybe a laughing clown, but ah.

SPECTRO:
HEAVY DUTY PLATINUM 6-SPEED TRANSMISSION OIL.
Designed by Spectro in response to complaints from Harley owners about the great but noisy new 6-speed transmission, this full synthetic provides ultimate lubrication protection. Formulated to significantly reduce gear noise and provide easier, smoother shifting, this SAE 75w140 formulation eases shifting even when cold. High loads and extreme heat do not affect the oil, so it performs well when pushed hard and long. A.P.I. GL-5 rated.

HEAVY DUTY PRIMARY CHAINCASE OIL.
This sheer stable petroleum is designed to withstand the punishment of high loads, and contains special polymers to provide exceptional clutch engagement and temperature stability. Meets full OEM requirements, and should be used according to manufacturer’s instructions. Formulated specifically for Harley® Sportster and Big Twin applications. Low drag, low friction loss SAE 85w viscosity eliminates clutch “drag”

I like to keep well stocked. Bottom left of storage rack.

Baloffski
4 years ago

Yes , now that is one dam fine ale. That when living in Tasmania, was called the Moose head man, Red or dead, till hit 50 then ahh.
Good stuff friend.
I used all kinds a shite in my Guzzi's 1000's and 1100's they worked well, same with 1450 Harley, I think changinging within reasoanble time frame is the secret,
I USE PENRITE .
My Call, But I Like..

paulybronco
4 years ago

Quoting Baloffski on 17 Jun 2020 07:03 PM
Don't think Ross was around when we all did the praise on Redline. Shifts are smoother PB, most definitely.

Quoting Birtyyy on 18 Jun 2020 01:33 AM
I wasn't either but I just went and did a search of old threads, I'll definitely be looking for a local supplier when I do my next service.

Bursons in Nambour have it or can order it in for you

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