K7 Whats the Best Petrol ? Also Tips for Winter Storage ?

[Greebo]

Hi Guys
Its coming very close to putting my CB 750 sohc to bed for the winter.

This being my first early CB 750 sohc, I am looking for tips on the best Fuel to use & tips for winter storage, mainly regarding the fuel, my bike is a K6 but as got the K7 Carbs on with the accelerator pump.
Because it will be stored for around 6months  I am thinking of emptying the fuel tank & running the fuel out of the carbs, instead of leaving the fuel in & using a an additive.

What are your thoughts ?

Cheers
Greebo

[mick]

Hi Greebo all I do to my CB750 is turn the fuel tap off and drain the float bowls completely , it lives in a wooden shed for the winter and wasn't used for 9 months this time but fired up no prob's, cheers Mick

[SteveD CB500K0]

Drain the carbs but leave the tank full to keep the (damp) air out.

Use a fuel stabiliser.

Steve

[haynes66]

keep the tank full and take it for a thrash on dry days. works for me!

[royhall]

Greebo. Check out this thread.  http://www.sohc.co.uk/index.php/topic,8911.0.html

[Greebo]

Thanks for the reply guys.

Problem with filling the tank is its a 5 gallon Alloy tank  , my bike is a café racer build, don't fancy leaving 5 gallon in it for 5/6 months...

The petrol I use is Shell V-Power..99RON...  http://www.shell.co.uk/motorist/shell-fuels/shell-v-power-nitro-plus/shell-v-power-nitro-plus-unleaded.html


obviously theres no problem with corrosion setting in the tank with it being alloy

I think I will go for emptying the tank & the carbs,

If I run the Engine with the fuel tap switched Off until it Stops will that be enough to drain the float bowl ?

Cheers
Greebo

[mike the bike]

I always drain my tank over the winter and leave the filler cap open to prevent condensation.   I run the engine until it runs out of juice and then drain the float bowls,  leaving the drain cocks open.   Leave some blue roll under the carbs to catch any remaining drips.  After a few months of hibernation,  with some fresh juice, it starts straightaway

[MarkCR750]

Last winter there were only 3 weekends that I couldn't ride I.e when it snowed or rained constantly, the rest of the time there was at least one afternoon or morning during the weekend where the roads were dry, and that's in Derbyshire which isn't exactly tropical 😀, so I agree with Haynes66 just keep riding!, during the few weeks when there is dried salt on the road just clean the bike well when you get back, it's a shame to leave them locked away unused IMHO. Here's a shot of my 15 year old XJR which has been used over the last 3 winters by me, no corrosion whatsoever.
[ Guests cannot view attachments ] [ Guests cannot view attachments ]

[Greebo]

I always drain my tank over the winter and leave the filler cap open to prevent condensation.   I run the engine until it runs out of juice and then drain the float bowls,  leaving the drain cocks open.   Leave some blue roll under the carbs to catch any remaining drips.  After a few 


Excuse my ignorance, this is my first CB 750 K & first Carb' bike for 10 years , how do I identify the drain screws, I see the 4 overflow pipes so must be around there somewhere.. ...

Cheers
Greebo.

PS >> I have now found the screws & sorted it...thanks guys !!

[mike the bike]

My bikes 40  years old, I spent lots of time and money restoring it after being nicked and wrecked so I don't want the winter crud ruining all my hard work.  I bought a 650 Katana as a winter hack but I'm restoring that as well (l know, I can't help it) although not to the same standard.
Because I have a company van, I don't ride as much as I'd like anyway

[gtmdriver]

I add Frosts Ethomix to the fuel and run the bike long enough to make sure it gets through the whole system then I switch the fuel off and run it till it runs dry.

[MarkCR750]

My bikes 40  years old, I spent lots of time and money restoring it after being nicked and wrecked so I don't want the winter crud ruining all my hard work.  I bought a 650 Katana as a winter hack but I'm restoring that as well (l know, I can't help it) although not to the same standard.
Because I have a company van, I don't ride as much as I'd like anyway

Ha, interesting to see that your wife fell for the "I'm just buying this one as a winter hack" routine, my latest "winter hack" is a 43 year old hustler (restoration underway 😏)

[mike the bike]

It worked though, besides,  you've got to have a hobby.  Otherwise you'll waste your life in front of the telly.

[royhall]

Most of the fuel additives are only there to stabilise the Ethanol in the petrol. Don't let the Ethanol get in there in the first place (see this thread http://www.sohc.co.uk/index.php/topic,8911.0.html), job done the fuel will survive more than a winter without issues. Just run it up until its fully hot once a month if your not using it.

The Ethanol can evaporate rapidly causing crud and it absorbs water from the atmosphere which causes your tank to rot. If left long enough in a damp garage it can absorb enough water to separate out and be just water at the bottom of the tank. Mega rot and mess. Cant stress enough, please guys keep the Ethanol out of your bikes, they will also run better without it. BP Ultimate Super Unleaded (except in the South West).

[MarkCR750]

Agree Roy, here's a photo of steel left in aspen ethanol free and ordinary lead free [ Guests cannot view attachments ]