Big pile of dogshit

Thanks Victor, I think my issue is cam timing/valve
clearance/decompressor related, or perhaps cam wear. I will replace the starter stuff and if it continues to play up I will ask for the valve gear to be checked out.

I bought the bike approved used from BMW with 16,000 miles on it. It is very clattery, the dealer said “they all do that Sir”. It now has 19,000 miles.

As an aside, I stalled it pulling away from cold a couple of days ago and on restarting, it made a horrible metallic bang like a kick back, it’s never done that before.
 
Thanks Victor, I think my issue is cam timing/valve
clearance/decompressor related, or perhaps cam wear. I will replace the starter stuff and if it continues to play up I will ask for the valve gear to be checked out.

I bought the bike approved used from BMW with 16,000 miles on it. It is very clattery, the dealer said “they all do that Sir”. It now has 19,000 miles.

As an aside, I stalled it pulling away from cold a couple of days ago and on restarting, it made a horrible metallic bang like a kick back, it’s never done that before.
My money’s on starter, relay or cabling. If any terminal is slightly loose - this could be problem. Like I said, my first step would’ve been to remove all the possible culprits and clean with GT85 or something 🤔
 
My money’s on starter, relay or cabling. If any terminal is slightly loose - this could be problem. Like I said, my first step would’ve been to remove all the possible culprits and clean with GT85 or something 🤔
Btw, don’t know if any of you guys owned an early YZ426?? It was the first proper banzai 4 stroke that transitioned many crossers from 2 to 4 stroke. Many called it a 3 stroke even. Anyway, this MF refused to start when hot!!
If you even looked at throttle, it would flood and plugs needed removed. Was a proper little bastard if you stalled in the mud. Think later models had a hot start, but not mine.
Digression I know, but that was a proper pile of dog shit!! Lol
 
The starter motor peak inrush is 300A @ 12Vdc.

The battery rating is 200CCA.

And people wonder why they are hard to start.
 
All starter issues now sorted by replacing the original battery for a Motobatt MHTX16 Hybrid item and replacing the starter relay.

Spins up nicely now. :thumb2


Sent from my iPhone using Tapatalk
 
Batteries seem in short supply at the moment so I ordered from motorworks as they had stock at £144. Had I have realised, I could have ordered from them via their eBay page and saved myself the £7.50 postage charge on top. :blast

Cheapest place I’ve found them since is at motorcycleproducts.co.uk for £121.30 plus £6 delivery. :thumb


0d7a9c9eaa38fd37e9114758ac0675de.jpg

dd7138d6ae875b239675b7c2133d6690.jpg

7bf482e201ae1f2a0e8b0a347b672096.jpg

9b07dab18fb392a41fe591b550e6c681.jpg

f0b3fca33391e02947e5c2454e3d692c.jpg

I used one foam spacer from those provided to pack out the difference in heights so it was a snug fit inside the battery box.

Some slight oxidation had formed on the cable eyes to the relay, easily remedied with a scotch pad and some electrical grease once the cables were replaced and tightened.

I replaced the starter relay for a new item just in case it was part of the problem. I need a reliable bike for touring.

Sent from my iPhone using Tapatalk
 
Last edited:
Those multiple screws on the battery bus bars is a great idea - saves trying to cram various +ve wires all onto one terminal!

Do you think this battery has deffo solved the prob, i suppose you won`t really know until you do a `warm start` after the engine has only been run for a mile or so when this starting issue usually rears it`s head?
The random nature of this `quirk` is what is making a definate solution so difficult to find..
 
I did a couple of hot starts in succession. It now bursts into life instantly whereas previously it would struggle. Last time it died on me after a ten mile journey when I stopped to get petrol on the way home from work. It has also recently been throwing up TFT nuisance warnings like “key out of range” and “SOS faulty, visit dealer”, plus tracker alerts……all voltage related after difficult starting.

The battery is allegedly capable of supplying typically 350 amps with higher voltage.

It’s as good at starting now without my lithium booster pack as it was previously with a tired AGM battery plus booster (if not better). It also seems to idle more smoothly for some reason. I’m very impressed.

I’ll ride it to work tomorrow for a cold start test but don’t anticipate any issues.
 
The random nature of this `quirk` is what is making a definate solution so difficult to find..
Indeed, which is why I replaced the starter relay even though the original may be fine. I also have a spare used starter motor from a 2021 bike as a last resort in the garage just in case.

In my opinion, both the battery and its interconnecting cables don’t look man enough as standard. Once batteries age and lose efficiency, starting a hot engine can be a problem especially if as I suspect, the exhaust cam decompressor sometimes plays up when hot.

Having 350 amps on tap with higher terminal voltage should now provide sufficient energy to the starter motor.

I could always plug in my Noco booster if stranded, but my concern is stalling in a busy foreign city junction (stressful enough) and then being unable to just restart immediately on the button and ride off safely.
 
Batteries seem in short supply at the moment so I ordered from motorworks as they had stock at £144. Had I have realised, I could have ordered from them via their eBay page and saved myself the £7.50 postage charge on top. :blast

Cheapest place I’ve found them since is at motorcycleproducts.co.uk for £121.30 plus £6 delivery. :thumb


0d7a9c9eaa38fd37e9114758ac0675de.jpg

dd7138d6ae875b239675b7c2133d6690.jpg

7bf482e201ae1f2a0e8b0a347b672096.jpg

9b07dab18fb392a41fe591b550e6c681.jpg

f0b3fca33391e02947e5c2454e3d692c.jpg

I used one foam spacer from those provided to pack out the difference in heights so it was a snug fit inside the battery box.

Some slight oxidation had formed on the cable eyes to the relay, easily remedied with a scotch pad and some electrical grease once the cables were replaced and tightened.

I replaced the starter relay for a new item just in case it was part of the problem. I need a reliable bike for touring.

Sent from my iPhone using Tapatalk
Will be fitting mine just as soon as it arrives so again thank you for spotting in cheaper and saving me £20 odd

I owe you a beer or two!
 
Been reading this thread very closely. I've never had any starting issues but I like the look of this hybrid battery, never heard of them before.
My bike is a 2020 GS with 22k miles. I've no idea how old the battery is but judging by the level of crud all over it it's been in there a while. I've so far never had any issues, hot or cold but I'd rather not wait until an issue arrives and I get caught out. On the other hand, if all is well then why try and fix a problem that isn't there. Yet......
 
I'm impressed so far with the hot and cold starting but its early days. I need petrol again after work so will repeat the journey that it failed on last time and see how it restarts. If it carries on starting instantly like this I will be delighted.

The only drama I'm having is registering on the "Hendler" (Motobatt Importer) website for the free second years warranty, you have 21 days from purchase to do this. I took pictures of what I thought was the serial number prior to installing but their website doesn't recognise it as a known number (you also have to upload images of both the serial number and also proof of purchase to their registration page (screenshot of invoice etc). I also had to manually input my bike as a 1250 as it wasn't an option on their drop down menus.

I will ring Motorworks later as they sold it and ask them for clarification, I'm probably missing something obvious.
 
Been reading this thread very closely. I've never had any starting issues but I like the look of this hybrid battery, never heard of them before.
My bike is a 2020 GS with 22k miles. I've no idea how old the battery is but judging by the level of crud all over it it's been in there a while. I've so far never had any issues, hot or cold but I'd rather not wait until an issue arrives and I get caught out. On the other hand, if all is well then why try and fix a problem that isn't there. Yet......
The hybrid is maybe the way forward, but too early to say 🤔
Issue with Lithium is you have to be careful charging below 0 degrees (read don’t do it!)
Uncommon to go on fire, but little consolation to poor sod that set fire to Luton Airport parking lot!! lol
I have lithium in Harley and GSA without issue though. Didn’t notice big difference with GSA, but game changer with Harley. Standard lazily turned over, but 500CCA lithium spins motor like a top!!
 
I was a little nervous to be an "early adopter" as I couldn't find anybody else in UK with a GSA using one. I noticed they have been in use in USA for about three years so must be proven by now.

What attracted me most was the instant grunt of Lithium without the charging dramas, inability for sustained load and need of a special charger due to it being AGM with a Lithium in tandem.

It has a two-year warranty once registered and I learnt you can buy them for £127 delivered (mine was £151 :blast) so if I get two years plus without hassle I'm happy, a standard AGM is about £77 in comparison.
 
Last edited:
As the Motobatt is hybrid, why is the lithium part not damaged by an AGM charger ?
The lithium battery on my Honda warns against doing so.
 
Because the hybrids have a built in Bms to do the job of managing the hybrid charge current so you don’t need a charger that has that facility.
 
As the Motobatt is hybrid, why is the lithium part not damaged by an AGM charger ?
The lithium battery on my Honda warns against doing so.
I also think its more of a booster addition than a full on lithium battery like yours.
 


Back
Top Bottom