Battery

[Martin6]

I've got to the point where i will start to address my leaking head. Before I  remove the engine I wanted to check the compression. I started on a compression test yesterday. My battery gave up and again today after all night on a battery tender. In fairness, it has a manufacture date of 2005!

Are the replacements from David Silver good? Any other recommendations?

Thanks, Martin

[royhall]

If you can afford it fit an Advanced Glass Mat Battery (AGM) they hardly ever need charging, even on the winter layover. Plus an extra benefit is there's no acid to leak on your paintwork. Got them on all my bikes, can't recommend them highly enough.

I think the batteries at Silvers are Gel type. Not the same thing as AGM.

[paul G]

Found this company excellent


https://www.tayna.co.uk/

[Bryanj]

I second tayna batteries and the numax is fine, the 500 Ted had off me say for 8 months and started fine

[Martin6]

Thanks, used the link and ordered an AGM 14Ah, 200CCA for £37 delivered. Not bad.

[royhall]

That's a very good price for an AGM battery. Nice one.

[Oddjob]

If my head was leaking, I'd go see a doctor Martin. Last thing you want is brain cells coming out of your ears.

Bit late to advise but all batteries are not the same, even of the same type. Check CCA figures for Cold Cranking Amps, the higher the figure the stronger the battery.

For the 500/550 the standard battery was the Yuasa 12N12A-4A1, the wet cell battery has about the same CCA as an AGM, the Exide has the most of any of the replacements at 165 CCA, however you get what you pay for. If you want an AGM (and who wouldn't, no battery acid spilling all over your new paintwork and chrome) then the cheapest is the Powerline at £30, it's a 150 CCA battery, the slightly more expensive Numax at £41.95 is however less powerful at 135 CCA, so I'd avoid that, the best is the Motobatt at 160 CCA but it's a lot more expensive at £63.03. Given the choice you can buy 2 Powerline batteries for less than 1 Motobatt, it's slightly less powerful but not that much. I'd buy that one I think.

[Pauarc]

I always use a battery pack for more power when running a compression test post a picture of your leak only in Totham if you need a hand

[Martin6]

Oddjob, I bought the Powerline. It Quotes a CCA rating of 200A. https://www.tayna.co.uk/motorcycle-batteries/powerline/yb14l-a2-agm/
Be a bit annoyed if that's inaccurate.

[Nurse Julie]

Oddjob, I bought the Powerline. It Quotes a CCA rating of 200A. https://www.tayna.co.uk/motorcycle-batteries/powerline/yb14l-a2-agm/
Be a bit annoyed if that's inaccurate.

Thats what we use on all our 750/4's Martin, from Tayna😊😊😊

[Martin6]

I always use a battery pack for more power when running a compression test post a picture of your leak only in Totham if you need a hand

👍
The front head bolt, just in front of the head cover, visible in-between exhausts 2 and 3, has sheared, by the look of it. It's too long to pull out without removing the head cover. Also, the head bolts that can be checked inside plug holes 1 and 4 were a bit loose. I think the previous, previous owner had the head off (and possibly went further) for new rings. But didn't torque it up properly, putting too much force on that bolt.

I'm not burning oil, but the head join is generally oily and misting the bike nicely. There's a few drips as soon as I stop and put it on the sidestand, as it runs off the fin. Plug no.1 is sooty and I think it's probably the leaky head.

I've been putting off dealing with it, to enjoy the bike this summer, but also dreading getting the motor out of the frame. Never done it before! Also, undecided how far to go. A 40,000 mile motor with no history. I probably ought to check the condition of everything, but it seems to run fine until no.1 plug soots up. So I'll probably limit it to a visual inspection of the bores and cam and a de-coke as needed. Then do my best to put it back together oil tight.

[Martin6]

Oddjob, I bought the Powerline. It Quotes a CCA rating of 200A. https://www.tayna.co.uk/motorcycle-batteries/powerline/yb14l-a2-agm/
Be a bit annoyed if that's inaccurate.

Thats what we use on all our 750/4's Martin, from Tayna😊😊😊

👍

[Oddjob]

Different battery Martin. I did say for the 500/550 as the variants in the 750 range could mean that different types were fitted to different models, like between the F and the K for instance. If it says 200 it will mean 200. Reading between the lines it looks like Powerline may be a decent battery. Not sure who makes them though, looks to be Tanya itself.

[Martin6]

Battery arrived lunchtime, less than 24hrs after the order was placed, with 'standard' delivery. Impressive.

Bike strip down has commenced. I feel like I'm committed now!

[McCabe-Thiele (Ted)]

Different battery Martin. I did say for the 500/550 as the variants in the 750 range could mean that different types were fitted to different models, like between the F and the K for instance. If it says 200 it will mean 200. Reading between the lines it looks like Powerline may be a decent battery. Not sure who makes them though, looks to be Tanya itself.

I fitted a Powerline to a previous car as it had the highest specification (Ah & cca)for the casing size at a competative price.