170cc Big Bore Piston Kit Time Line

The quality & engineering of Grom parts?

Guys,

Lets take a second and talk about quality, and the engineering of parts:

I have had a few email today asking if they could have the piston kit sooner, valid question? The answer is no. So why not?

I have been manufacturing racing engine parts for over 38 years. My first racing cylinder head porting company was formed in 1974. My parts have helped win the NASCAR championship & the 24 Hours of Daytona. But that is not important to you guys. What's important is that your Grom big bore kit is bored correctly, honed correctly, and sized correctly, so that it runs as good as the Honda OEM parts, and it makes Kick-Ass horsepower. That it does not use too much oil, that it lasts for more than a couple of months, it's quiet, and lastly that it works correctly with the Honda fuel injection, so that your bikes engine does not fail! That you have an email & phone number of a real human being that is capable of answering your questions when you are assembling the kit. It's important that you have a good set of instructions, do's & don't. Because all of this is what I would expect if I spent my hard earned money on aftermarket engine parts. Why is this so important to me, well I'll tell you: my name is on these parts, my reputation, but, this may sound corny, but over the years, most of my customers have become friends. What a great way to do business. So if there is an issue with something, and once in a while, something will slip through, it's handled, taken care of, if it's my fault, no questions ask, it's replaced, period. Because that is what I would want.

I have a beautiful YSS shock here at the shop. I have purchased about $2800.00 worth of YSS shocks over the years through EPM the US importer, had great luck. This Grom shock is too long, way too stiff, and is not at all sorted out. I'm sending the shock to Klaus at EPM to get it re-machined to the right length, and a different, lighter spring installed, so that I can use it. Another $200.00. Help from YSS & Tyga in Thailand, zero help, emails answered, no. Do I do any more business with them, no way.

So guys, it's coming as fast as I can do it, and give you a real quality part, that you can be proud you bought, and that I can be proud to have manufactured. If you need it faster than Feb, I understand. I want people to want to wear my Kick-Ass T shirts, because they are glad they spent the money, and they have a smile on the face, when they blow by their friends.
Brian Sheridan
Kick-Ass Racing Components

Other Engine Parts?

I already have a ported head done. I'm going to flow it with the 61mm cylinder, but with the stock valves first, and then the larger valves second. The only reason that it is not flow tested it yet, is that they are moving the flow bench at work to a new room, and it won't be working until late next week. The 61mm head gasket will be done in about 4 weeks. The throttle body flows plenty of air, 90 CFM, so it will not be a restriction. The air box with the metal plate/screen removed is OK the way it is. I'll have a CFM number on all these parts by the hollidays. I know that the secondary rubber tube in the air box is better removed, but then it needs the velo stack, that I made, so I'm having that quoted right now. The cam is another story: I talked to MegaCycle Cams 2 weeks ago. They probably have more usable grinds in stock than anyone else, but they didn't seem to want to do it, unless I had about 50 cams done at once. I'll call them back. Anyone of the larger diameter,1", head pipe exhaust out there will work OK. I have my test exhaust set at tuned length, and I can feel a difference. The dyno testing wil get done over the hollidays.
Brian