Ebay Carb Boots

[Erik the Bike Man]

Just got my '71 R5 back together after sitting blown up for almost 6 years.  Failed a leakdown test with TONS of air dumping out the intake boots.
These are the cheapo boots off ebay.
Spent a couple extra bucks on the ones that EconomyCycle carries.  The originals I have show zero signs of dry rot, but they are hard as a rock.

[m in sc]

yup. glad you caught it.

and, welcome to the board.

[Milan]

Take your originals & soak them in ArmorAll for a few days.
See if they soften.
I have also soaked them in brake fluid.
They soften up, then soak in ArmorAll after.

M

[Brad-Man]

Get some wintergreen oil and acetone and soak 'em to soften them up...

[m in sc]

i don't see them on ec or yambits, but HVC seems to have them. i would go this way:

https://hvccycle.net/yamaha-r5-ds7-intake-manifold-carb-joint-278-13555-00-00/

[busa1300]

I have been buying bits from here

https://prod.allensperformance.co.uk/accessories/manifolds-and-adaptors.html

[Economy Cycle John]

Genuine Mikuni

https://www.economycycle.com/shop/yamaha-rd250350400r5ds6ds7-parts/fuel-and-airintake/manifolds-yamaha-rd250350400r5ds6ds7-parts/manifold-for-yamaha-r5-and-ds7-sold-each/

[STLMike]

I've been soaking some of my "non-essential" parts in 303 and it seems to be softening them up a bit.

[m in sc]

@ John, had a hard time finding these (didn't actually..). I searched for 'intake' though. 

[Economy Cycle John]

under the manifold section in fuel and air or use search box at top of screen and search for R5 manifold, will come right up.

[m in sc]

yup. see that. like said used wrong search word, no big deal. 

[Erik the Bike Man]

welcome to the board.

Thanks!  I was semi active on here around 2013 or so and just made my new account.

i don't see them on ec or yambits, but HVC seems to have them. i would go this way:

https://hvccycle.net/yamaha-r5-ds7-intake-manifold-carb-joint-278-13555-00-00/

Economy Cycle does have them.  They're in and working great.
My originals perhaps could be softened up, but the sealing flange surface is eaten away to nothing.  No way I'd ever trust them.

Genuine Mikuni

And another question I had answered!  I didn't see the Mikuni logo molded into them like the originals, but the numbers are there.
Thanks!