QUESTION FOR XJ650RJC (Canadian) Seca OWNERS:

I am going to get a small borescope and check as the photo XJ550H has of the 900f engine mine has the same bolt heads on both sides of the cylinders. My engine has DOHC where the YICS emblem is.

 

Hi again,

Gasket problem solved, but another question : I experience too stiff front suspension. There is no SAG at all when the bike stands on it’s own weight. I assume the previous owner did some modifications (aftermarket front springs) as I read everywhere that the OEM front suspension is too weak. Maybe there is a difference between a XJ650 maxim front fork and a seca fork ?

Can anyone measure the length of a standard 1982 XJ650RJC seca front fork spring ? I think a correct set of front springs will really improve the bike’s handling. For the rest the bike runs (and looks) great.

 

I see a lot of the DOHC emblems I think they are add ons from another bike or aftermarket as the YICS emblem is costly.

 

could be more oil than spec or heaveier wt than spec or used 10w30 motoroil

236cc, 7.98 oz of 10wt fork oil

5V2 82-83 factory service manual

540.5 mm spring length form haynes

spec from haynes is also for the 4K0 euro 650 so yours is likely the same

 

It is definately a YICS engine (I think all the 900's are) it has the four ports the o rings sit on. The emblem is costly I had a look for them.

 

Canadian RJC same as euro and Australia model without headlight on/off switch. Yamaha Canada figured we need the oil cooler because we have fewer months of great weather so we ride like hell in the time we have.
Pic is of spare engine.

 

Is it possible that a spacer has been installed on top of spring ?

 

Yesterday I opened one fork for inspection. I found a 3 cm spacer tube on top of the spring. Lucky for me. It gives me the chance to gradually cut it until the problem is solved.
Thanks for the feedback (also to chacal, who I accidentally contacted through the conversations section)

 

As for the initial thread question :
1982 XJ650RJC SECA
15U000350
YICS, intake manifolds orientation :

/ / \ \

 

I have same year and VIN is close. I have 15U000321