Jets for 70 carbs on 50 yamaha ?

**yukoner** · 06-01-2007

I've heard it mentioned here that 70 carbs will 'wake up' the 50 yamaha. What size jets does the conversion require for a stock (no port work) motor?

**Fast Fred** · 06-01-2007

145's in metric,

**Fast Fred** · 06-01-2007

No, i've never worked at a Yamaha factory, and i dou't thay would know for sure,but A guess "off the Cuff" from them would be worth hearin.

**Fast Fred** · 08-23-2007

**yukoner** · 08-26-2007

What is the motor built for , and how much extra porting ? I need a good stong 50 yamaha or tohatsu.

**Fast Fred** · 08-27-2007

Ok. lets see ,she got a fresh LU, ( all new bearins and seals)
tuned pipe, welded crank, new wiescos,fresh bore the ports are blended not far from stock,heads been cliped, got reinforced bracket, you need the handel?
2 with out the handel, 24 with the handel, that what the handel cost.
i drove it once, and fired it on me stand thats all the time on it, i drove it to check the burn.

let me know if thats any good for ya,
Oh ya, them is New premix 70hp carbs, New as in out of the box. i'll crate it for ya.

**Fast Fred** · 08-27-2007

built for, what ever a 50 hp 15" shaft Yamaha fits on, just guna be fasta

at the end of the day, the price reflects the parts and service done

**Fast Fred** · 08-30-2007

hey yukoner,
give me a sign if ya can, got some others wantin to take a swing at it, but was offered to you first, i'll wait a few more day on ya

**yukoner** · 09-02-2007

I need to count my marbles. Might have to hock something to get there. will you work with me? If I could pay so much per whenever to get the motor after a few months that would be great. another concern is shipping. Could you dissassemble to make the USPS 70 lb. shipping limit? Probably take four boxes. other shipping methods are to spendy for me. At any rate it sure looks and sounds like the one I need.

**Fast Fred** · 09-03-2007

Yukoner, thare was some one else, i told them i was waitin on you, thay asked till when,? i said thats a good Q', so went with 12'o clock noon sunday,
at 12:05 it was his, payed in full.
i can build you another if you would like, and i'll work with ya, Sorry, now i feel Bad

about it.