Actually…more like 16 months on. The Interceptor, or as she is known “Lakshmibai, the Rani of Enfield” has gotten almost 15,000 miles put on her in a combination of trying to kill myself on out twisty mountain roads and commuting to my workplace 23 miles away from home. As the earlier reports have illustrated, Her Majesty has been hopped-up considerably: S&S pipes, high performance cam, high compression pistons, and a airbox eliminator were added, making the bike a nightmare to keep running until we put a Power Commander V on her and got the folks at Speed Associates up in Farmington to dyno and tune the hell out of the fuel map. All bikes are way too lean, these day, for Euro emissions standards, and the Enfields are no different. Fortunately, mine is the last of the Euro4 bikes, so we had little issue enriching the fuel and squeezing almost 20% more power out of her. Here, at a mile up, she turns out 50hp at the wheel — so at sea level, that means she’s pushing 62-63hp and about 50 ft-lbs. of torque. (For comparison, the Honda CBR650R of that year was pulling 86hp and 43 ft-lbs. out of their mill. That’s not bad.) I had (once!) hit 125 mph on the speedometer, flat on the tank, slightly downhill, throttle all the way open, and juuuuuust slipping into the redline. (So figure 115ish with speedo creep.)


Fortunately, there’s a fair number of folks here in the area that love these 650s, so I have a fair amount of anecdotal data to pull from, in addition to my own. The bikes get about 60 mpg at our altitude and on our shitty “winter gas” with ethanol and only 91 octane; in the summer, 70ish without the ethanol. Most folks have had no issues with their bikes, but most also have much few miles than I do on mine. It does seem the need valve adjustments about every major checkup. You’re supposed to do it every 3000, but I’ve been doing the 6000 mile cycle every 5000 miles and the valves are usually just at the edge of spec or slightly out. If you do your own work, it’s pretty easy to do. If you don’t, it’s a bit of a hassle, if you put the mileage on your machine that I do.
Fit and finish on the bikes remains good. No rust or other defects to report, but I did drop my keys on the tank and the paint for the striping on the tank is thin; it had a couple of little paint chips, now. The stock tires (in the US) are the Pirelli Phantom Sportcomps — a tire that was awful on my Street Cup, but works exceedingly well on this bike. I’ve thought about changing out, but they are the cheapest option, so why bother? The frame and geometry on this bike is superlative. It doesn’t feel like 450 pounds. It turns — the favorite road for the motorcyclists here is tricky, with a lot of tight turns and sweepers. She sticks with the “higher end” sportbikes in the turns without issue, and I’ve yet to have her lose her footing. My friend’s GT doesn’t have the torque I do, now, but his bike is not slow; the gearing on these is good, although sixth could be taller. He also recently threw a TEC two-into-one pipe on (they sound fantastic, by the way…)
Issues I’ve had seem to be specific to the modifications done: She definitely has a bit of heat sinking going on in the summer and is more prone to detonation if you give her the gas too quickly in the high gears. This is really specific: it happens between 4200-5000rpm. If you ease through it, she’ll usually have no issues. If you drop to 4th and punch through it, then upshift to where you’re above that engine speed (so about 80mph), no issues. I’ve also had detonation in high wind — and I mean high! We’ve been having a hell of a wind season…I mean spring: both my friend and I had detonation in 35mph plus 50+ gusts while riding. The engines were warm, we were going uphill, and I suddenly started losing power while he was getting engine knock.
So, with a year and a bit behind me, I have to say the Enfield has managed to finally displace my old 2010 Thruxton as my favorite bike. The quality of the build is definitely not what we remember from the old Bullets, and the performance and design is top notch. The newer motorcycles, the Meteor and Classic look to be even high quality; I’m hoping to get a chance to ride the Classic sometime soon.
Update: My buddy and I tried some cooler NGK spark plugs and found these mitigated most of the left-over detonation I was having. I also added a 16 tooth front sprocket, going up one. This didn’t seem to lose me any of my low end torque but it really opened up the mid-range on the Interceptor, with an average drop in engine speed of about 500 rpm. Now, in fifth gear at 55 mph, the mill’s turning about 4000-4200 rpm. I highly recommend the sprocket change.
5 November, 2022 at 03:30
Well BlackCambell .. I’m guessing at a ‘mile high’ you are probably in Montana or somewhere close. Can’t be easy to get one of these 650 twins to run smooth at that altitude but you have certainly tried. Thanks for all the info re your mods and running experience with the Interceptor .. not that I’m thinking of getting one as I’m happy with my new 350 Classic for now.
I’ve pressed the follow button so I can keep up with your informative posts – cheers – Don in Bonnie Scotland 👍
5 November, 2022 at 13:28
New Mexico, so close!
Where in Scotland. I’m from Dumbarton; still have family there and Helensburgh.
5 November, 2022 at 16:08
I’m in Comrie, Perthshire my friend. I had no idea Abuquerque was at that altitude. My daughter was a long-haul air stewardess with BA before the pandemic and often did that trip.
I’ve had more bikes of all kinds than any sensible man should but I’m enjoying this wee Enfield 350 Classic for what it is.
If I may I will follow your interesting experience with the Interceptor and enjoy your sunshine – cheers Don 👍
23 February, 2024 at 23:00
Great fun read. I’ve had an gt 650 for a year at 5000′ elevation here in so AZ. Looking to do same cam and piston mod as well. love hearing your experience and thoughts on this upgrade. Cheers!
24 February, 2024 at 07:42
I’d definitely do the cam, but I’d suggest avoiding the piston job.
25 February, 2024 at 22:39
Just considering the hi compression piston only not big bore kit. I’ve read that is worth doing if you’re already in there replacing the cam.
26 February, 2024 at 06:12
That’s what I did. The high compression caused loads of issues with knocking — but I’m also in a hot region and high altitude. YMMV
20 August, 2024 at 00:59
Hi. Thanks for the blog. Being an long term ’79 Bonnie rider you’re interested in all the bikes I’d consider as a more modern replacement. The Ducati monster i have is great, but it’s less forgiving than I’d like for all around use. The Interceptor come up high in my list of possible replacements (as does the Guzzi), surprisingly I can’t get excited about the modern triumphs, they look porky and bloated compared to a T140. I test rode a new interceptor, but found the ergonomics a bit weird (and the suspension not great). So it’s good to hear that’s just a matter of adjustment. Anyway, i found the motor nice, but a little bland, lacking the urge of an old Bonnie. After reading you’re real life experience (and your undoubted long term riding experience) I’m thinking about the Int-650 (sorry!, Shame on you Honda) yet again, but with some mods. Like you I’m not generally into modifying a bike for the sake of it, so i was thinking just a few discrete alterations. Was it the stage 1 or stage 2 cam you went for? It sounds a good starting point to me.
20 August, 2024 at 07:35
I used the S&S performance cam. It’s approved by RE so if your dealer drops it in, it doesn’t void the warranty. I’d pair with their pipes, as well; sounds better (but not loud).
22 August, 2024 at 02:11
Hi. Me again. Apart from the engine mods, did you feel the need to change the seat and/or suspension at all? When I went for a test ride it was on a brand new bike. Did you find yours got better with some braking in? The bike felt like an easy ride, quite fun. It says a lot that it became one of your favourite bikes and that you were still comparing the V7 against it. For me all bikes are compared against my T140 Bonneville (a shock to most people, I know) .
22 August, 2024 at 07:15
I did the touring seat. Much better. The suspension is on the primitive side, but I like that. I ticked the rear up one notch, but that was it. That allowed for some super-aggressive riding on the local mountain road (very twisty) with complete control. The bars and seating position really lend themselves to effortless riding.
The V7 is very close in flickability, and is one of the most stable bikes at parking lot speeds I’ve had, but the Interceptor did a mile on pure ice and never slipped once. If I hadn’t found my old Thruxton, I’d have stayed with the Enfield (even though it’s a better bike than the Triumph…the Thruxton is just better looking.)