Author Topic: SRM  (Read 2707 times)

Online Klaus

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Re: SRM
« Reply #15 on: 29.07. 2015 16:22 »
As l stayed at Wales with my daugther for hollydays, l visit SRM an d Gayy gave us a 2 hours leading an d explaining round the company.
I was realy impressed, and sayd to myself when having engineprobs call SRM.
The day come and a valveguid get lose inn the head. So I stripped the engine and found a worn Cam and followers.
With no expirience with this twin engine I decide to send the enginge to SRM to give it a complete overhaul with the needlebearing conversion.. As the enginge was rebiuld I picked it up personaly at SRM. I have spend a lot of money and time, tought this engine would be nice for the next few years, but it wasn't.
The Oilconsumption was over one liter per 1000 kilometres. After about 6000 miles the piston was brocken in line with the guedionpin.
So I striped the engine again and found worn cams and followers.
So I had some bad expirience with SRM and could not recommend them.

Cheers
Klaus


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Offline a101960

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Re: SRM
« Reply #16 on: 29.07. 2015 16:49 »
What is very bizarre, is that they used to (I don’t know if that is still the case) say that engine rebuild guarantees  would be invalid if an in line oil filter was used! Why would that be I wonder?

Online Klaus

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Re: SRM
« Reply #17 on: 29.07. 2015 17:20 »
I don't know why SRM  recommend this monograde Oil after an engine rebuild.
My opinion is if the engine is rebuild and clean, the best is to fit an oilfilter and use a 20/50 multigrage Oil.
Except for race engines, there you have only a little milage between the oilchanges.

Cheers
Klaus


If you think, everything is under control, you are not fast enought.

Online metalflake11

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Re: SRM
« Reply #18 on: 29.07. 2015 18:30 »
I don't know why SRM  recommend this monograde Oil after an engine rebuild.
My opinion is if the engine is rebuild and clean, the best is to fit an oilfilter and use a 20/50 multigrage Oil.
Except for race engines, there you have only a little milage between the oilchanges.

Cheers
Klaus

Is that what you did with your re-built engine?
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Offline muskrat

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Re: SRM
« Reply #19 on: 29.07. 2015 21:41 »
G'day Klaus.
It's always advisable to follow instructions to keep the guarantees.
I would suspect they (SRM) would have specified a high zinc mono for cam and follower protection.
The piston would have passed inspection but was flawed somehow.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
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Offline Clive54bsa

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Re: SRM
« Reply #20 on: 30.07. 2015 04:37 »
I have used SRM for well over 15 years. The work I've had done and parts I have bought are numerous.
Without writing a book on my experiences I'll stay positive. Their end crank oil oil feed conversion works, although I did have one of their special "roller, ball Bearing" fail after 13,000 miles, and yes of course I changed the correct oil regularly. (I consulted a bearing specialist in Los Angeles and he told me that most bearings have a 1% failure rate, so I must have been that 1%)
And their special SRM oil pump, although pricey, is good. For everything I've had done by SRM, I wish I hadn't.


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Online Klaus

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Re: SRM
« Reply #21 on: 30.07. 2015 08:19 »
I don't know why SRM  recommend this monograde Oil after an engine rebuild.
My opinion is if the engine is rebuild and clean, the best is to fit an oilfilter and use a 20/50 multigrage Oil.
Except for race engines, there you have only a little milage between the oilchanges.

Cheers
Klaus

Is that what you did with your re-built engine?

Yes l did,
I do a high milage every year, most about 10.000 miles, l have not a modern bike.
Touring revs are about 4000 and for overtaking up to 5500.
After this expirience with SRM I have build up serval engines, all fited with oilfilter and runing modern oil.
No more probs, but l use original overgrind cams with forged survace.
I also use special MAP cams with higher lift, but have to maschine the cam tube to fit in.
Also no trouble with it.

I don't trust in new SRM parts especialy the oilpumps, they are not plug and play....the last 2 ones not. Anothers mate engine burst
by a faulty SRM pump.

The SRM recommented pushrods are much more havier as the originals... do they realy flex?????


I also use this multigrade 20/50 at my race enginge, giving a 10 minutes warm up, and after racestart the revs dont fall under 4500 for the next 20 minutes. That means allways full throttle. Highest revs are scratching 7000.
It is the second season for this engine and there is no oilconsumption between changes after about 300 miles.

So l ask myself and make my own expirience not sure in need of SRM

cheers Klaus


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Offline muskrat

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Re: SRM
« Reply #22 on: 30.07. 2015 08:39 »
I have never had any engine work or major parts from SRM. A few small items (crank cush nut, taper roller s/head bearings etc) were good quality/fair price.
95% of talk about SRM is positive but with everything there is a fail factor.
I built my own race motors (A7) and only used std oil pumps, std rods (A10 shortened), std SJ cranks. After the first one I did my own roller conversion. The only problems I had was the SJ cranks breaking or the barrels lifting off the cases (14:1 comp & 8000 revs do that *eek*) but never an oil problem. So I can't justify the cost of an SRM oil pump. YET ::hh::
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
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Online KiwiGF

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Re: SRM
« Reply #23 on: 30.07. 2015 11:09 »
And muskrat when you decide you need a better pump you can instead fit an a65 pump body and get the same 30 odd per cent volume increase as they have wider gears just like the srm pump  *beer* *bright idea* *lol*

Yep an a65 pump is what I've got...I spent the money saved on billet con rods  *yeah*
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Offline Topdad

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Re: SRM
« Reply #24 on: 30.07. 2015 11:25 »
Hello, I like that idea, what do you have to modify?
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Online bsa-bill

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Re: SRM
« Reply #25 on: 30.07. 2015 11:57 »
good question Bob, I've got an a65 one I think, it's got a longer neck so presume that has to be swapped also the drive shaft maybe.
All the best - Bill
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Online KiwiGF

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Re: SRM
« Reply #26 on: 30.07. 2015 12:16 »
To use an a65 pump yes the a10 drive part needs to be used together with an a65 body, on mine the pump was a bit stiff until the bolt holes were slightly enlarged in the a10 part to get a slightly better alignment.

My a65 pump is the same sort of material as the a10 but I've heard there are iron body a65 pumps which are better still to use.

It's quite hard to tell the difference between the pumps without measuring gear widths etc, one way to tell is that the a65 has a bigger oil hole on the mating face to allow for a different anti wet dumping spring arrangement.

Ps ...the off topic police might not like this....
New Zealand

1956 A10 Golden Flash (1st finished project)

1949 B31 rigid “400cc hot rod” (2nd finished project, + favourite bike)

1949 C11 rigid, but why!!! (cos it was cheap)

1937 B21, project missing parts, mission impossible?

GL1800 Goldwing, well, the wife likes it

KTM 950 ADV, cos it’s 100% nuts

1952 Armstrong Siddeley Whitley for rainy days (with wife

Online cyclobutch

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Re: SRM
« Reply #27 on: 30.07. 2015 13:00 »
I was once warned off the SRM pump because of it's greater flow rate. The reasoning was that the oil would spend less time in the tank cooling down. Surely that is a mad argument?
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Online Klaus

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Re: SRM
« Reply #28 on: 30.07. 2015 13:12 »
I was once warned off the SRM pump because of it's greater flow rate. The reasoning was that the oil would spend less time in the tank cooling down. Surely that is a mad argument?

Absolutly *roll*

It is hard work to heat up Oil over 80 degree celsius *grins*


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Offline scotty

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Re: SRM
« Reply #29 on: 30.07. 2015 14:29 »
I've had a few things from SRM over the years:
Oil Pump, complete 4 spring clutch, crank hex nuts, gearbox bits.
All have been of superb quality and technical advise has always been happily given when I call them with my lame installation questions  *eek*
I'll be spending my hard earned canadian pesos there again one day
S

Scotty
'56 A10 Red Flash
'54 B33
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