Hunting parts for the next Briggs 5hp build

[Thepartsguy]

I have on hand
-spare arc rod stock length
-Clements cylinder head
-electronic coil + drop bracket
-Flywheel
-cam
-Wiseco standard bore piston
-Bearing block 132232

I still have yet to buy
-22lb valve springs
-billet arc sidecover with crank/cam bearing
-big tube exhaust/rlv muffler

When I do finally get those last three needed hotstock parts I’ll start assembling.

Bonus points
-Mild port on intake/exhaust
-eyebrow shave
-tons of small pulsajet tweaks OR a f&b/mikuni setup.
-Methanol?? < always wanted to try this..

 

[Thepartsguy]

OHHH it all makes sense now I was like that piston isn’t a stock 3.875 .590 height part number?? Finally found what I was looking for 4.475 height rod for this one! Building a stroker!

 

[Thepartsguy]

I know NOTHING about a stroker 5hp BUT this is 2023 and I have a phone how hard could it be?

It looks like 1986ps is 2.5625
4.475 arc/horstman rod
comet kart sells spare 2562xl ring sets
cs-13 circlips are very available and cheap!
s-567 wrist pins are very available and cheap! Isn’t there a 4.475 horstman rod for like $50 on eBay? Or $99 directly through arc? So every single part to build a stroked standard bore 5hp can be bought cheap. The hardest part is finding the piston itself?

I now am hunting a 4.475 rod preferably used.

 

[Thepartsguy]

Oh my! So I have a chromed wiseco standard bore that fits a 4.475 AND a 4.5 rod. Pictures from OMB show a 4.475 horstman next to stock 3.875 briggs rod.

Block/cam work are needed to clearance this rod.
-Rings 2562xl
-spiral lock cs-13 wiseco
-s567 wrist pin
^^^^^^^^^— All ordered so I have spares for this piston.

To get this whole deal in motion all that is left is an actual 4.475 rod. I do not have one I those (YET) and to fit it and clearance what’s needed.

Then buy
-dynocam springs
-4.475 or 4.5 rod arc/Horstman
-exhaust
-arc sidecover

 

[Thepartsguy]

I’m selling some more spare tools tomorrow and I’ve found green stripe 32lbs springs a precision cam and the hardware kit for the springs along with a 4.5 rod all from the same seller! So i’m working stuff off the list.

 

[Thepartsguy]

Got a Not cheap intake.. And a $15 Tillotson carburetor.. Cracked open the tilly and I’m surprised it’s not a rusted ethanol mess...

 

[Thepartsguy]

Well parts gathering is near complete. And I’m still currently in the middle of selling off random bits here and there. I have the billet flywheel/drop bracket. All that’s left is 100+ lifters and an arc sidecover.

 

[Denny]

Why do you need 100 lifters? Most you should need is 2.

 

[Thepartsguy]

Why do you need 100 lifters? Most you should need is 2.

Ahahahah I was told to weld to the lifter tip to gain what was ground off the base circle and it would probably be ok. But I think I’ll spend the money.. dynocams still has the cheapest shipping option of $35+ I’m not sure if they refund what‘s not used on shipping or not. But the cost of the lifters + $35 shipping is still the cheapest I can find them new.

 

[Thepartsguy]

I still need those 1” longer lifters.. Also I’m hunting for a Billet sidecover with a cam bearing not a cam bushing.