Honda-SOHC
SOHC.co.uk Forums => CB750 => Topic started by: commando1954 on September 22, 2023, 09:08:30 AM
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Do genuine cb750 contact breaker point have any markings on them to identify them? Anyone know?
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Yes, they all have a makers mark on them but depends on what age bike as to which manufacturers were used.
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https://www.davidsilverspares.co.uk/graphics/parts/30203300154_1_large.jpg
This is listed as genuine part on DS for a 750 K1 looks like same part is listed for the K5.
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https://www.davidsilverspares.co.uk/graphics/parts/30203300154_1_large.jpg
This is listed as genuine part on DS for a 750 K1 looks like same part is listed for the K5.
They are modern day TEC points in that link Ted. 1971 points would have been ND, can't remember when they were changed to TEC but in the 70's sometime. Also, the manufacturers markings are stamped into the metal on the original points, not stamped in ink. All points are the same on all CB SOHC/4 models.
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https://www.davidsilverspares.co.uk/graphics/parts/30203300154_1_large.jpg
This is listed as genuine part on DS for a 750 K1 looks like same part is listed for the K5.
They are modern day TEC points in that link Ted. 1971 points would have been ND, can't remember when they were changed to TEC but in the 70's sometime. Also, the manufacturers markings are stamped into the metal on the original points, not stamped in ink. All points are the same on all CB SOHC/4 models.
So are TEC points inferior to Nippon Denso in some way or is it a case of matching the back plate with the points Julie?
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https://www.davidsilverspares.co.uk/graphics/parts/30203300154_1_large.jpg
This is listed as genuine part on DS for a 750 K1 looks like same part is listed for the K5.
They are modern day TEC points in that link Ted. 1971 points would have been ND, can't remember when they were changed to TEC but in the 70's sometime. Also, the manufacturers markings are stamped into the metal on the original points, not stamped in ink. All points are the same on all CB SOHC/4 models.
So are TEC points inferior to Nippon Denso in some way or is it a case of matching the back plate with the points Julie?
I don't think either are inferior, for many of us they've lasted 50+ years and still going strong. I don't think you have to match the back plate to the points either, I'm sure Hitachi manufactured the back plates at one time but the points were still ND or TEC 🤔🤔🤔. I am talking about OEM original parts here though, not more recent parts that are marketed as 'genuine'.
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https://www.davidsilverspares.co.uk/graphics/parts/30203300154_1_large.jpg
This is listed as genuine part on DS for a 750 K1 looks like same part is listed for the K5.
They are modern day TEC points in that link Ted. 1971 points would have been ND, can't remember when they were changed to TEC but in the 70's sometime. Also, the manufacturers markings are stamped into the metal on the original points, not stamped in ink. All points are the same on all CB SOHC/4 models.
So are TEC points inferior to Nippon Denso in some way or is it a case of matching the back plate with the points Julie?
I don't think either are inferior, for many of us they've lasted 50+ years and still going strong. I don't think you have to match the back plate to the points either, I'm sure Hitachi manufactured the back plates at one time but the points were still ND or TEC 🤔🤔🤔. I am talking about OEM original parts here though, not more recent parts that are marketed as 'genuine'.
So the DS points that he lists as Genuine Parts are neither ND or TEC - some new OEM supplier to Honda that is a tad misleading.
I thought someone on our site recently bought a complete back plate assembly that was TEC Julie?
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I bought one from DS mate
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'I thought someone on our site recently bought a complete back plate assembly that was TEC Julie?'.
I didn't say they did or didn't Ted.
The original question was about points, not the back plates.
'Genuine' means genuine Honda, it doesn't mean 'original' as in that was the part fitted to the bike originally.
Yes, it is misleading but only if one assumes that genuine means original, which it doesnt.
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The original points on the 500K0 in 1971 were Hitachi, as were all the electrical components fitted to the plate at that time. These were 30203-300-005 which oddly are listed by CMS as the ones fitted to the 750K0, the later points 30203-300-154 which are still the part sold today were listed by Honda as being made by Toyo, which I presume means TEC is Toyo Electrical Components or Company.
TEC points are quite distinctive, they are marked TEC by an embedded stamp, have a sort of chequerboard design on the face of the base plate and the pivot point bushing is different to Daichi for instance, a lot more substantial.
Finding genuine TEC points is getting quite expensive and not exactly easy these days, AFAIK Hitachi haven't been available since the TEC points came out except for old stock, all the ones I ever fitted were made by TEC.
OEM means Original Equipment Manufacturer Ted, so what DS is claiming is that he's gone back to the manufacturer that made that part back in the 70s etc and had them remade. What it doesn't mean is that they are made to the same standards that Honda would have stipulated back then.
And yes someone recently bought a complete plate from DS that was stamped as TEC
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Julie, I saw the photo in this post that I thought was supplied by DS you can see the TEC marking I just assume that it would come with TEC points so their points would be TEC, lets not go down the OvT route please.
Bryan does not say where he sourced his part or the brand he was sent.
Presumably commando1954 could contact DS and ask if they are TEC?
If they are TEC sounds as though the quality of the product today is not the same as they were 50 years - no surprise there I guess.
https://www.sohc.co.uk/index.php/topic,29709.msg286707.html#msg286707
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Ted, i did say i bought it from ds as it was about £94 whilst local dealer quoted £148.
Its put away now but i think it was tec and had the 154 end number
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Ted, i did say i bought it from ds as it was about £94 whilst local dealer quoted £148.
Its put away now but i think it was tec and had the 154 end number
My Bad you did say DS looking at the other post its a Tec back plate plus you can make out the same make on the points base.
Is it the case Bryan that modern Tec points are not of the same quality as original ones then?
Back in the day when Vauxhall fitted points it was the other way round - early AC Delco points had an issue for a while with wear on the heel of the points - they were improved using a different grade of material that was more wear resistant.
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AFAIK Ted the modern day points by TEC are as good as they always were.
It's the aftermarket points which are the problem, more notably the Daichi points. Compare a pic of TEC and Daichi and you can spot the differences, it's stuff like the way the points contact plates are made, the way the pivot bushing is done etc. Daichi seem to have cut corners to make them to a price, TEC made them to the original spec as stated by Honda and are far superior..
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These tec points were on my K5 when i bought it. Are these genuine?
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By all accounts they might be available at DS worth a phone call - they ain't cheap will yours not clean up, we used to file them down on cars before electronic ignition days.
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A pair of TEC points will cost you around £80. A full backplate complete with new condensers and a new wire is £126. The condensers alone are worth the extra £46. Depends if you can spare the extra money. For me it's worth the extra, most of the wiring to the points are frayed etc and starting to split.
I have some spare NOS TEC points if you want to just replace those, £66 for 2 inc P&P. Still in genuine Honda blister packs or bags.