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The 2-Stroke Garage => Turning Wrenches => Topic started by: soonerbillz on June 29, 2022, 09:38:02 AM

Title: Swapping DS7/R5 crank seals.
Post by: soonerbillz on June 29, 2022, 09:38:02 AM
Gonna be putting new seals in and saw this statement on another forum:

" After about mid production R5/DS7, the crank seals became located with a ridge that makes it a split-the-cases job to change it."

Now I think that was a answer to removing and installing the left side seal. But is there any truth to this?

Edit: I see HVC has a notification page on how to mod new ribbed seals for the R5 and DS7
Title: Re: Swapping DS7/R5 crank seals.
Post by: m in sc on June 29, 2022, 10:07:22 AM
ive never seen an r5 or ds with a lip seal, thats just incorrect. and I own 2 (fairly late) 72s right now.

pull em.



Title: Re: Swapping DS7/R5 crank seals.
Post by: soonerbillz on June 29, 2022, 10:16:23 AM
Thanks Mark.. I'm pretty certain the ones I bought from Economy are R5 specific and have no rib.
Do ya'll put any yamabond on them on install or just stick them in dry?
Title: Re: Swapping DS7/R5 crank seals.
Post by: Striker1423 on June 29, 2022, 10:28:47 AM
Just put a super light coating of oil or grease on them if you feel like it. Dry is ok though.
Title: Re: Swapping DS7/R5 crank seals.
Post by: m in sc on June 29, 2022, 10:36:36 AM
ive used a slight smattering of yamabond (motoseal) more as a lubricant. but ive gone in dry as well.  :toot:
Title: Re: Swapping DS7/R5 crank seals.
Post by: ampzip on July 25, 2025, 10:31:49 PM
Raising this thread from the grave to confirm - you can remove the crank seals on a DS7 without pulling the motor?

I have these seals:

https://yambits.co.uk/yds7-crank-oil-seal-rh-p-14802.html
https://yambits.co.uk/yds7-crank-oil-seal-lh-p-14808.html

The way they are pictured is the way they are supposed to go on?
Title: Re: Swapping DS7/R5 crank seals.
Post by: dgorms on July 26, 2025, 10:02:07 AM
Yes, top towards crank.