Saturday, Jun 08, 2019

I am far better at building engines than I am at building websites. That being said I am working on a new site which will be easier to use and have a better shopping experience.

Thanks for your patience, Danf_g_newsite_1

engine parts, news, pre unit, Triumph engine parts, Triumph gaskets

New Triumph SCTA Bonneville record set

Wednesday, Aug 31, 2016


Every August since 1949 (weather permitting), the Southern California Timing Association has organized the Bonneville National Speed Trials at the famed Salt Flats in Wendover Utah. This event is a week long all out festival of speed for cars, motorcycles, and all sorts of wheeled vehicles. A vast array of race teams attend, from well equipped (and financed) factory sponsored entries to shoestring budget home built machines, and everything in between.


Triumph motorcycles have a long history with the salt, as the most popular and fastest street model was named after the Bonneville salt flats in 1959. The World’s Fastest Motorcycle title was held by Triumph from 1956 to 1970. Since 1951 during SCTA events there have been Triumph twins racing at Speed Week. This August was no different.

Triumph 350, 500, 650, and 750 Pre Unit and Unit twins were raced on Gas, Alcohol, and Nitromethane.

Seven new Land Speed records were set by Six Vintage Triumph motorcycles over the course of the week.


I was tuning an engine I built for a Swiss race Team, who were running a 1955 650 T110 engine in the Vintage 750 gas class. Using a pair of 389 “chopped” monobloc carbs with matchbox remote floats on the original iron head, the top average speed over the measured mile was 126.832 mph. After a few tuning runs a new speed record was established of 123.534 mph for the A-VG 750 class.



Bonneville can be a tough place. Even the best prepared teams often find that something happens that they weren’t ready for. It could be mechanical parts breaking, unexpected wind, traction problems, or a host of other issues all in 100 degree heat with no shade.

It is every gearhead’s dream to find out what top speed potential is in their machine. Sometimes you set records but still don’t truly find out. There is always next year though…

For more information on Bonneville Racing see here



Amal, cheetah, news, Pre Unit Racing, Racing cams, scta

Hylomar® Products in stock!

Tuesday, Dec 15, 2015

Franz and Grubb Engine is now an authorized distributor of Hylomar products. There have been many imitators and look alike products, but genuine Hylomar is only made by Hylomar LTD in one place…England.hylomar_m_80ml2-copy
We are proud to add this incredible sealant line to our growing inventory, and anyone who does not use it on their bike has likely never tried it. Please see our helpful product overview page here, and for purchasing with reasonable pricing and fast shipping, see our store here

Hylomar, news, racing

Know your valve lift

Wednesday, Jan 28, 2015

A properly rebuilt cylinder head can only be achieved with the right tools and the experience of knowing how to use them. Valve guide interference fit, Valve stem to guide clearance, seat width, installed height, and coil bind are all important things to know and document.

When installing valve springs on a Triumph head it is imperative that you know your valve lift, which can be calculated by multiplying your camshaft lift by 1.11. The springs must then be checked on a valve spring tester to know your spring pressure both at the seat and at full lift. Triumph heads are notorious for having low spring pressure which in turn will destroy your camshafts, tappets, or both.


If you are building a head, or having one rebuilt, please make sure you are aware of your valve lift to save costly damage to your engine.

Kibblewhite, news, racing, reference


Wednesday, Aug 06, 2014


Franz and Grubb will be closed from Thursday August 7 to Friday August 15 to attend the SCTA Speed Week event at the Bonneville Salt Flats in Utah. We apologize for any inconvenience this causes you, and normal business will resume on Friday August 15. There are a lot of vintage Triumphs running this year, hopefully there will be some new records in the book by the end of the week.




news, pre unit, racing

Franz and Grubb Triumph degree wheels in stock

Thursday, Mar 20, 2014

triumph_degreewheelHere at Franz and Grubb we got sick of using automotive degree wheels to check cam timing. So we began the long process of creating the best degree wheel for vintage Triumph motorcycles. Completely made in the USA and hand finished, this degree wheel will be a welcome addition to anyone’s tool box. For ordering and more information click here.

news, pre unit, racing

Online store open now!

Wednesday, Dec 04, 2013

The thing that makes this shop unique is that we primarily stock and sell mechanical parts for vintage Triumph motorcycles. Many businesses gravitate towards products that require no technical knowledge, are currently fashionable, or have the highest profit margins. We know that shiny parts or cool points covers don’t make an engine run better, and that a strong and reliable engine is the sum of its parts when assembled correctly.

If you are in need of valves, spring kits, or valve train equipment please check out our new online store.

Our intimate knowledge of applications, proven success with Kibblewhite, and close relationship with the company, has made us the number one retailer for Triumph Kibblewhite valvetrain components in the USA.

Kibblewhite, news, racing


Tuesday, Mar 12, 2013

Boring, honing, cleaning, painting, baking.

news, pistons

Easy come, Easy go…

Friday, Feb 15, 2013

T120 rod failure Crate!
Well, not so easy. Depending on the condition of the engine, sometimes it takes months for these things to come together. The end result is always the same though…quality.


Franz and Grubb Signature vans® shoe!

Thursday, Aug 30, 2012

Franz and Grubb has the prototype for the new signature Vans shoe. This special version of the classic slip-on is geared towards vintage triumph owners who want to look like they did more work on their bike than screwing on some billet rocker caps that they ordered off the internet. Destined to be a collector’s edition, this “man’s shoe” will only be available in one color…”shop worn blue”. Please email the shop for the release date and further details… fgsignaturevans_0

news, pre unit, Uncategorized