Benelli 750 sei

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Re: Benelli 750 sei

Postby Lotus54 » Tue Dec 29, 2020 8:19 pm

John H wrote:Sounds like a tedious job. If you get stuck, I have a Neway seat cutter set and also access to a valve grinder.
Good Luck.


I have a seat grinder, but if valves turn out to need grinding, I would most certainly appreciate it.

Mark
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: Benelli 750 sei

Postby John H » Tue Dec 29, 2020 9:00 pm

What is the diameter of the valve stems?
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Re: Benelli 750 sei

Postby Lotus54 » Tue Dec 29, 2020 9:10 pm

John H wrote:What is the diameter of the valve stems?


I’ll measure tomorrow. They are pretty small.
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Re: Benelli 750 sei

Postby Lotus54 » Tue Jan 05, 2021 4:26 pm

I measured it, and of course forgot what it was before I wrote back...
So I did again.

5.45mm diamter. Pretty small. (Each cylinder is 125cc)
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Re: Benelli 750 sei

Postby John H » Tue Jan 05, 2021 10:27 pm

That is small! Will check.
This valve grinder only goes down to .250. Sorry.
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Re: Benelli 750 sei

Postby Lotus54 » Sun Jan 17, 2021 8:41 pm

Yes, valve stems are quite small. I just saw an adapter for many grinders that will work with small valves. But first I’ll see if I really need to grind them. They look in really good condition.

I have not done anything lately on it- other bikes came in to work on and I did some maintenance/mods on my dirt bikes I ride. Plus out riding, plus spending time with the grandkids. Plus goofing off.
The electric trials bike has been working well, still figuring range.
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Re: Benelli 750 sei

Postby John H » Mon Jan 25, 2021 9:06 am

I see a vintage Benelli 50cc mini enduro on the Racing Junk site. Looks like a nice one.
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Re: Benelli 750 sei

Postby Lotus54 » Mon Jan 25, 2021 6:02 pm

Interesting conversion. I’d probably put it back to origianl if I had it.
I’ve seen a few for sale now and then, nice machine.

I’ve always wanted the 180 Volcano mini. I’m not sure why
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Re: Benelli 750 sei

Postby Lotus54 » Sun Feb 14, 2021 1:12 pm

I’ve been working on cleaning up the head/valves etc. Coming along well.
I think I’ll get the head all together before doing the bottom end.

Also doing a few additions on the Electric-Motion Escape R (electric trials bike) and starting to work on a customer KLX250.
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Re: Benelli 750 sei

Postby John H » Tue Mar 09, 2021 8:05 am

How did the valve job finish up Mark? Did I offer up my Neway valve/seat cutter set? It is good down to 5mm stems.
I'm still looking for a small beginners Trials bike for the grandsons to learn on. I will consider trading my XR250R if something interesting show up.
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