K100RS question

Post your K Series technical queries here

Moderator: Moderators

andys
Forum User
Posts: 966
Joined: Sun Mar 25, 2018 9:33 pm
Country of Residence: UK

K100RS question

Postby andys » Sat Sep 19, 2020 10:25 pm

Went to look at a K100RS 16v today that's relatively cheap.
Condition was scruffy but salvageable so a couple of questions.
On start up it sounded rough and I quickly determined it was running on three.
The header pipe from cylinder one wasn't getting hot however after a short while and a little gentle throttle blipping it kicked in and sounded smooth and sweet.
The other thing I checked was under the gearbox where there's a hole.
My experience with Guzzi's which also have a hole in the same place, tells me that if there's oil dripping out of there then you likely have a failed rear main seal.
On this bike there was definitely a little oil seeping out but not enough to drip out.
It was just slightly wet to the touch.
I'd appreciate some thoughts on these issues.

krankshaft
Forum User
Posts: 137
Joined: Tue Dec 16, 2014 10:53 pm
Country of Residence: switzerland

Re: K100RS question

Postby krankshaft » Sun Sep 20, 2020 12:53 pm

Hi, Andy
If the bike is otherwise sound and you are getting a good bargain, the rear main seal is not that difficult to change and you can
grease the gearbox output shaft splines while your in there.
As for starting up on 3 cylinders, would need further investigation.
Good luck
Ride safe
Jim

andys
Forum User
Posts: 966
Joined: Sun Mar 25, 2018 9:33 pm
Country of Residence: UK

Re: K100RS question

Postby andys » Sun Sep 20, 2020 4:56 pm

Funnily enough I was chatting to a guy with a K75 today who said exactly the same as you about the rear main seal.
Trouble is I just don't have the space and know-how to tackle it myself.
What would be a reasonable cost for a mechanic to do it

krankshaft
Forum User
Posts: 137
Joined: Tue Dec 16, 2014 10:53 pm
Country of Residence: switzerland

Re: K100RS question

Postby krankshaft » Sun Sep 20, 2020 5:45 pm

It would be difficult for me to say, I usually take about 6 hours, but I am not a professional mechanic and I am slow,
but it would be difficult with limited space and no bike lift.
Good luck
Jim

User avatar
george baker
Club Member 14
Posts: 7734
Joined: Mon Aug 01, 2005 10:51 am
Country of Residence: uk
Location: Manchester,UK

Re: K100RS question

Postby george baker » Tue Sep 29, 2020 11:07 am

Hi
Ive forgotten where you are AndyS, if you are local to Manchester I will recommend a good independent repairer who always has a waiting list of customers

George
Member 21, R100R, and an under used K75

Mike D
Forum User
Posts: 1821
Joined: Thu Oct 18, 2007 3:12 pm
Country of Residence: UK
Location: Near Daventry, UK

Re: K100RS question

Postby Mike D » Tue Sep 29, 2020 1:18 pm

Oil dripping from that particular hole could be engine or gearbox. Have a sniff you will be able to tell what oil it is. Gearbox oil has a distinct aroma!

The other weep hole is near the front. This is for the water pump. If you get either water or oil from that one, then it's time to look at the pump.

Mike

andys
Forum User
Posts: 966
Joined: Sun Mar 25, 2018 9:33 pm
Country of Residence: UK

Re: K100RS question

Postby andys » Thu Oct 15, 2020 12:28 am

Hi
Ive forgotten where you are AndyS, if you are local to Manchester I will recommend a good independent repairer who always has a waiting list of customers

George
I'm in Peterborough but happy to travel
I didn't go for the bike in the end.
Still looking


Return to “K Series Q&A's”

Who is online

Users browsing this forum: No registered users and 5 guests