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5th Gen vfr800fi Thermostat dimensions?


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Hi Peeps.

 

I'm trying to source a stat from other vehicles that may fit our 5th Gen's?

Makes no logical sense why a bike stat should cost 3-4 times the cost of a car stat.

Honda Jazz stat looks very similar apart from the 4 missing bypass holes in the base plate, but this can be easily rectified.

 

I don't have a spare OEM stat to take pics & measurements from at this time.

Does anyone have a knackered OEM stat to post up pics & exact dimensions from?

 

Cheers

 

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Here's a 10+ year old thread I found.  Some good info, but no smoking gun.

 

 

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You may be right, Gaz, and I hope that you find one to share with us...but you'll likely buy one of these in your life. How much time do you want to put into finding an alternative to save a few bucks? 

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Agree with bmart.

Is it really worth the effort going with a non genuine item for maybe a once in a lifetime replacement? Also considering its a pain in the arse job, why not be confident in knowing you've fitted exactly the right one and only needing to do the job Once? Simply drilling bypass holes in a non genuine T/Stat doesn't sound like a good plan just to save a couple of bucks.

 

Both 5th AND 6gens use the same T/Stat P/No. 19300-MBG-003 listed as $43.45 on Partzilla. Should be plenty of stock around.

 

Love a 5th gen in Yellow - Looks a gem.

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Having replaced the thermostat on my yellow 99 last year I can only endorse what everyone else has said:

1. Yellow VFRs are beautiful

2. Changing the thermostat is very painful and you will only want to do it once

3. For reason 2, just get the OEM part.

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Thanks for all the replies on this 5th Gen Thermostat topic.

I thought it may had been looked into & put to bed at some point in the past.

I wasn't doing this cos I'm cheap, I was genuinely looking for a cheaper solution that would benefit us all.

I don't need a new stat at present, bike's running mint & tucked away until spring, sure I'll need a stat at some point tho.

 

In the UK for some weird reason, bike specific stats are quite pricey for what is essentially nothing more special than a car stat albeit in different dimensions.

 

Yes my Yellow 5th Gen is a beaut, thanks for the kind comments.👍

If anything promising comes up, I'll share my findings with forum.

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2 minutes ago, Gaz66 said:

I wasn't doing this cos I'm cheap, I was genuinely looking for a cheaper solution that would benefit us all.

 

 

 

I agree, and was in the middle of getting you the info when you posted this.  Fellas, with all due respect... these bikes are a quarter century old.  OEM parts aren't going to be plentiful forever.  If someone else is willing to do the legwork and lift throttle bodies to find alternatives, why in the world would you discourage that?  😕

 

Here you go.  Thermostat is stamped 82C, branded "NTC" which appears to be a large supplier of automotive parts.  Your idea for an alternative makes good sense.  The four bypass holes are approximately 2.5mm.

 

thermotop.thumb.jpg.562a708ca6d5239a59092e36894f240f.jpgthermotall.thumb.jpg.20435d049522fe4d14eff341fc07fb0b.jpgthermobottom.thumb.jpg.7c261bcf993b5c384a513fb7568deaf5.jpg

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12 hours ago, vfrgiving said:

 

 

I agree, and was in the middle of getting you the info when you posted this.  Fellas, with all due respect... these bikes are a quarter century old.  OEM parts aren't going to be plentiful forever.  If someone else is willing to do the legwork and lift throttle bodies to find alternatives, why in the world would you discourage that?  😕

 

Here you go.  Thermostat is stamped 82C, branded "NTC" which appears to be a large supplier of automotive parts.  Your idea for an alternative makes good sense.  The four bypass holes are approximately 2.5mm.

 

thermotop.thumb.jpg.562a708ca6d5239a59092e36894f240f.jpgthermotall.thumb.jpg.20435d049522fe4d14eff341fc07fb0b.jpgthermobottom.thumb.jpg.7c261bcf993b5c384a513fb7568deaf5.jpg

Awesome info, many thanks "vfrgiving".

 

Kind Rgds

Gaz (UK)👍

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Please post up an alternative if you find one.  All that should matter is the opening temp and dimensions.  For those worried about the bypass holes, looking at the T-stat up close they definitely weren't made with Honda space-lasers and aren't perfectly round.  With a soft jaw bench vise, center punch, split point drill bits and a steady hand anyone should be able to do the same.

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On 1/11/2024 at 10:23 PM, Captain 80s said:

Here's a 10+ year old thread I found.  Some good info, but no smoking gun.

 

 

On 1/11/2024 at 10:23 PM, Captain 80s said:
On 1/12/2024 at 9:23 PM, vfrgiving said:

 

 

I agree, and was in the middle of getting you the info when you posted this.  Fellas, with all due respect... these bikes are a quarter century old.  OEM parts aren't going to be plentiful forever.  If someone else is willing to do the legwork and lift throttle bodies to find alternatives, why in the world would you discourage that?  😕

 

Here you go.  Thermostat is stamped 82C, branded "NTC" which appears to be a large supplier of automotive parts.  Your idea for an alternative makes good sense.  The four bypass holes are approximately 2.5mm.

 

thermotop.thumb.jpg.562a708ca6d5239a59092e36894f240f.jpgthermotall.thumb.jpg.20435d049522fe4d14eff341fc07fb0b.jpgthermobottom.thumb.jpg.7c261bcf993b5c384a513fb7568deaf5.jpg

 

 

Captain 80's posted a link to a15yr old thread, not much help on this occasion as Honda (NTC) stat prices have shot up 3 fold here in the UK, probly same across the pond in USA/Canada etc?

From my hrs of searching, thru part screens & manufacturer dimensions, it looks like the OEM stat that (NTC) not Honda have made under licence for Honda is specifically for Honda bikes, yes a few other Honda models use this same 82 degree (NTC) stat, no car stat has these exact dimensions from my searching.

 

Nearest I can find is listed for certain year Honda Jazz's it's an offset centre, all dimensions match apart from the larger top flange is 10mm greater in diameter, it also has a jiggle pin, but missing the 4 bypass holes in the smaller plate on the bottom, easily drilled, so no big deal, only concern is I can't find any good enough pics to verify the jiggle pin is close enough to the stats centre to allow it to be ground down enough to fit the VFRs stat housing.

Can't find a dimension correct stat in 82 degrees, they're 78 degrees for the above Jazz stat & its from a known manufacturer, approx 1/7th of the price of a NTC Honda stat, so it's potentially usable, albeit a bit of grinding &  drilling & it opens 4 degrees earlier, may be a plus for hotter climates.

Here in the UK, on sale at £10, where as the ridiculously over priced Honda (NTC) stat is £73 + shipping from a UK Honda dealer, there are other Gen Honda stats available from Honda specialists like (Dave Silvers UK) at around £50- £60 but that's still 5-6 times the sale price Honda charge.

I can't justify paying £50 plus for a stat, it's just crazy, when car stats are £10-£15, they're no different, just different dimensions.

 

So I'm going to order the £10 Jazz listed stat & see if it's worth modifying & check if it'll work withing the VFR's stat housing.

I'll update this thread if I'm successful or not.

 

Keep it shiny up guys.

 

Rgds

Gaz (UK)

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FYI, the bottom disc with the bypass holes is held in place with just a side-mount external retaining ring.  If the new T-stat you're getting is assembled the same, I don't see why you couldn't just swap the disc over from the outgoing OEM t-stat.  Should only take a minute and you wouldn't have to drill anything.  That wouldn't do anything for top plate fitment, but it would be one less thing you have to modify.

 

An important measurement I didn't give prior is from bottom of top flange to bottom of bypass disc.  That appears to be 37mm

flange2flange.thumb.jpg.73a5c2f2952a9fa50a913cf264aa9832.jpg

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With some ingenuity you could just swap the thermo element from any correct size temp unit into your old Honda part. 

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