I've had it reconditioned since then, the chambers are perfect now
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| AFTER MARKET...... 6H3 ......70 hp...... CYLINDER HEAD https://hpbc.ca/viewtopic.php?f=19&t=4092 |
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| Author: | Hounddog [ November 13th, 2018, 12:29 am ] |
| Post subject: | AFTER MARKET...... 6H3 ......70 hp...... CYLINDER HEAD |
https://www.ebay.com/itm/6H3-11111-01-1 ... rk:11:pf:0 Does anyone know if this head can be shaved down enough to get 150 to 160 lbs. compression? You can't get there with the stock YAMAHA 6H3 head. You can with a 70CES head, but they sell for approximate $1000.00 US. |
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| Author: | mattmak [ November 13th, 2018, 5:54 pm ] |
| Post subject: | Re: AFTER MARKET...... 6H3 ......70 hp...... CYLINDER HEAD |
How much can be shaved from a true Yamaha factory 6H3 head? What compression do you end up with? |
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| Author: | Hounddog [ November 14th, 2018, 12:12 am ] |
| Post subject: | Re: AFTER MARKET...... 6H3 ......70 hp...... CYLINDER HEAD |
mattmak wrote: How much can be shaved from a true Yamaha factory 6H3 head? What compression do you end up with? I have tested several untouched stock heads and one milled one. UNTOUCHED.....low of 107 to high of 121 ...they were on different USED 6H2 powerheads....many were around 110 to 115 The milled one was 134 and so thin metal wise I just put it in the junk bin I would not run it. |
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| Author: | Roflhat [ February 8th, 2019, 6:21 pm ] |
| Post subject: | Re: AFTER MARKET...... 6H3 ......70 hp...... CYLINDER HEAD |
I've got a 2 piece genuine CES head I would sell, 150psi across all 3 |
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| Author: | Hounddog [ February 8th, 2019, 8:18 pm ] |
| Post subject: | Re: AFTER MARKET...... 6H3 ......70 hp...... CYLINDER HEAD |
Roflhat wrote: I've got a 2 piece genuine CES head I would sell, 150psi across all 3 Matt and DOC here's your chance to get a good CES head.....150 psi is correct for a legal 70CES. http://www.rib.net/forum/attachments/ph ... aa0a9a.jpg |
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| Author: | Roflhat [ February 9th, 2019, 5:20 am ] |
| Post subject: | Re: AFTER MARKET...... 6H3 ......70 hp...... CYLINDER HEAD |
I've had it reconditioned since then, the chambers are perfect now
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