JES BUILT Motorcycles

10/02/2026

Thank you Phil Taylor-Bond for the cool decals. I added the original to remind more who the rider is.

09/28/2026

Modifying a set of pistons to suit my needs. I took the dome down .040" and took the center web out on the intake side. With my modified combustion chambers. This setup works well. The bigger pocket takes a deeper breadth at low lift. AHM pistons had the same pockets on the intake side.

09/11/2026

Here's a tip for the new mechanic.
If you don't remember where all the different length of bolts go. Install them in the cover you think they go in. On a Honda they should stick out right near 13mm or 1/2". You can see the 2 bolts that go through the dowel pins are a bit longer. This is because the threads start deeper in the main case because of the dowel pin bores.
I hope that helps some of you out.

08/31/2026

Here's tip for sealing the cylinder studs in a DOHC CB head.
Many think that the cylinder stud washers are copper. No, they are copper coated steel washers. If you have been in one of these heads then you have seen the washers and how they gall the head.
I spray a light coat of copper coat on them. Then let them tack up.
Then I dip the washers in engine oil before I put them on the studs. This helps keep the galling to a minimum.

08/31/2026

Here's an FYI that I just realized.
I was putting a set of cases together and couldn't get the countershaft seal to sit properly. The seal is a 2 piece seal and I had to pull it apart a ways to get it to sit flush against the bearing and have the lip on the seal fit in the cases. This didn't sit well with my mind so I compared the seal to an OEM Honda seal. The seal on the left is OEM and it's 3mm taller than the seal that comes in the 4into1 seal kit. So now I will be using the seal kit and have to get an OEM seal for the countershaft.

Descriptions on each picture if you click on them.

China strikes again. We not make same. We make Simawa.
If you are going to copy something make it right or don't bother FFS.

08/22/2026

Here’s an FYI to the folks wanting to be DICK HEADS.

My page is for sharing my experience, others to share theirs and people to ask questions without being laughed at. That way we can all learn.
Here’s my reply to someone who was being a DICK because another person miss spelled a word.

So Sir if you want to be a Karen/asshat and be the spelling police. Go somewhere else. My page is for people to ask questions, share their knowledge with others and most importantly. Be able to ask questions and miss spell if it happens. I have zero tolerance for people attacking others just because it makes them feel good but in everyone else’s opinion you’re just being a DICK. If you can be polite and speak like you’d like to be talked too? Then stay and share your vast knowledge so we all can learn. If you can’t, then just leave or the next time I see you being a Dick. You’ll be gone.

08/22/2026

08/22/2026

Here's a little piston trivia for you. On the right is an OEM CB1100F 70mm piston and it weighs 202 grams. On the left is a Wossner 70mm piston coming in at 174 grams. Thats a huge savings in weight. Have you ever thought about how heavy your pistons are at TDC and BDC at 10,000 RPM. I don't know the exact numbers but I believe it is in the hundreds of pounds when it has to change direction in a milli sec.

08/19/2026

The "Experts" are out in force today. On one of the simple posts again. Must be 20 experts. I been laughing most of the day.

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