Author Topic: Porting / port cleanup with guides in place?  (Read 1275 times)

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Offline Garage_guy_chris

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Porting / port cleanup with guides in place?
« on: January 15, 2015, 10:05:54 PM »
Just another quick question, is it ok and manageable to do some mild porting / port cleanup with a good set of guides in place and a good valve job already done on the seats? Im not so worried about debris but the guide being in the way?
1971 Cb450 Cafe  (on the road)
1974 Cb750 Restomod (on the road)

Offline stikman

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Re: Porting / port cleanup with guides in place?
« Reply #1 on: January 16, 2015, 01:15:10 AM »
It is if you're careful.  I wouldn't want to touch the seats while porting either before or after they've been done.  But depending on your porting plan, you may want to taper the intakes guides down a bit anyway, so I wouldn't be too concerned about touching those.
1977 CB750A "High Horse": 836cc, mild porting, custom cam, K5 roundtops, v-stacks...
1973 CB750K D5 plunger frame chopper currently building..

Offline Lostboy Steve

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Re: Porting / port cleanup with guides in place?
« Reply #2 on: January 17, 2015, 08:32:54 AM »
It is if you're careful.  I wouldn't want to touch the seats while porting either before or after they've been done.  But depending on your porting plan, you may want to taper the intakes guides down a bit anyway, so I wouldn't be too concerned about touching those.

I agree. I ported my head and edged the guides on the intake side a little. Then had a machine shop cut the valves.
1968 Honda Z50
1977 Honda CB550K
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Offline turboguzzi

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Re: Porting / port cleanup with guides in place?
« Reply #3 on: January 20, 2015, 01:43:21 PM »
doable