Z1R BUILD

If in doubt, or it doesn't seem to fit elsewhere - put it here.

Re: Z1R BUILD

Postby John H » Fri Jan 10, 2025 11:25 pm

While in SoCal for the holidays I picked up the 78 Z1R exhaust that was in storage. Considering it's age it's in pretty good condition. Most of the wear has come from handling. I spent the day cleaning and buffing out as many of the scratches as possible. Exhaust pipes 1 and 4 are welded to the collector so this was the most difficult to buff. Next will be buffing out the muffler.
Adding Exhaust.JPG
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Re: Z1R BUILD

Postby John H » Sat Jan 11, 2025 7:31 pm

Well, this wasn't suppose to take a year to complete. What started out as a cleaning job turned into a complete rebuild. The only difference now is a nice chrome exhaust system instead of the old Yoshimura that was on when i bought the bike. Next will be oil and gas so hope all goes well :?
Finished.JPG
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Re: Z1R BUILD

Postby John H » Thu Jan 30, 2025 11:59 am

I have delayed the valve cover problem long enough. The cover had been poorly chrome plated and the finish had deteriorated such that it required being painted. After sanding/filing away any loose chrome I decided to powder coat it instead. The chrome on the 4 exposed ends was good so masked off to give the original look.
valve cover.JPG
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Valve cover fin.JPG
Valve cover fin.JPG (209.52 KiB) Viewed 1259 times
Valve cove on.JPG
Valve cove on.JPG (305.39 KiB) Viewed 1259 times


The decal for the front fender finally showed up. Outline tape was placed for a reference to help line up the four pieces. As I started removing the backing paper it separated leaving a thin film stuck to the decal.
Cautiously with a pen knife and some water I tried removing the paper. Most came of but along with it the adhesive also came off. I had a conversation with the supplier who apologized and has sent out another set. Hopefully no more problems.
z1r decal.JPG
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Last edited by John H on Fri Jan 31, 2025 10:50 am, edited 1 time in total.
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Re: Z1R BUILD

Postby Lotus54 » Fri Jan 31, 2025 8:21 am

The cam cover with black and chrome ends looks great. I will have to keep that in mind.

Have you started it yet?
1976 OSSA Super Pioneer- 78 Benelli 750 sei,72 250 2C Benelli, 68 Benelli Dynamo trail, 76 OSSA GPII Phantom, Beta XTrainer 300, Lotus Elan S3
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Re: Z1R BUILD

Postby John H » Sat Feb 01, 2025 9:15 pm

I found a spot of oil under the output shaft so pulled the sprocket, then the gearbox cover and found the thin paper gasket had a tear in it. :oops:
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Re: Z1R BUILD

Postby John H » Tue Feb 04, 2025 7:41 pm

I may have mentioned before that the fuel tank had a lot of rust in it. I filled it with a vinegar solution and a handfulf of small square nuts. Rocked it around for several minutes then left it sit for a while........ actually I left it for over a week during the Christmas holidays :oops: . On emptying the vinegar it looked worse than before I had added the solution. Well, after watching several youtube videos I went for it. I mixed up 5 gallons of distilled water and a cup of Arm&Hammer laundry booster soap which is bicarbonate of soda, and when dc current via an anode and a cathode are connected it activates a current, drawing rust to the anode.
IMG_2698.JPG
IMG_2698.JPG (258.22 KiB) Viewed 6 times

After about 30 minutes I withdrew the anode and this was what came out. It took several 30 minute cycles before the anode came out with just a small amount of rust. I used the pressure washer to flush it out and dry it before adding a gallon of 2 stroke gas for a final rinse. It's finally nice and clean.
IMG_2716.JPG
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