Has Tesco 99RON killed my bike? - Page 2 - SV650.org

24-02-06, 10:45 AM

Carb icing ?? Just a thought.... Never suffered it with my curvey but I know it can be a problem. I always run my 'Blade on Optimax whenever I can, the tank range tends to be better...

.

24-02-06, 10:45 AM

Quote:

Originally Posted by Saracen

I think it's probably not the fuel per se, but rather the higher octane stuff doesn't respond well to running lean maybe?

I actually changed to the higher octane stuff after the engine started cutting out on me and it seemed to reduce the frequency of the cutting out. Its just what I observed, and since I got better fuel consumption from the higher octane stuff, I kept with it.

24-02-06, 10:49 AM

Quote:

Originally Posted by Kate

I actually changed to the higher octane stuff after the engine started cutting out on me and it seemed to reduce the frequency of the cutting out. Its just what I observed, and since I got better fuel consumption from the higher octane stuff, I kept with it.

Has your bike been adjusted for the exhaust?

24-02-06, 11:04 AM

I believe the Tesco 99 RON juice is actually a 5% Ethanol/petrol mix. But I wouldn't have thought it would upset anything, unless it is icing with a change in fuel volatility. Unless an engine management system can advance the ignition timing to take advantage of the higher octane rating, it's debatable that you'll get any tangible benefit from spending more money over the cooking fuel.

24-02-06, 11:17 AM

Quote:

Originally Posted by chazzyb

Unless an engine management system can advance the ignition timing to take advantage of the higher octane rating, it's debatable that you'll get any tangible benefit from spending more money over the cooking fuel.

I think any noticeable change in performance is probably psychological, however, I do get better tank range on the good stuff, and many people say they get easier cold starts.

Whether the increased tank range is actually worth the difference in true cash terms, I always run my bikes from full to the light coming on, then look for a garage. If this means that I get an extra 10 miles or so from a tank then that's fine by me....

.

24-02-06, 11:18 AM

Quote:

Originally Posted by Saracen

Quote:

Originally Posted by Kate

I actually changed to the higher octane stuff after the engine started cutting out on me and it seemed to reduce the frequency of the cutting out. Its just what I observed, and since I got better fuel consumption from the higher octane stuff, I kept with it.

Has your bike been adjusted for the exhaust?

I believe it had, its not a problem now though as the SV is well and truely dead

jambo · 24-02-06, 11:32 AM

I only tend to see carb icing when I've been unning for a bit as it's to do with moisture in the air coming over the jets yada yada yada...

Check the battry's fully charged and the connections are good, but I'd think the cold's just causing it some greif.

I'm always happy with standard 95RON stuff from where ever, but it's doubtful anything higher would hurt.

BillyC · 24-02-06, 01:15 PM

The fuel is fine, your bike has the compression to handle such fuels.

However, you have drastically affected the fueling of the bike, and the back pressure from the exhaust. It's no surprise that performance has been affected, and the tuning will be all off.

Get it checked.

24-02-06, 01:16 PM

I'd stake a years wages that the fuel has absolutely nothing to do with it (unless it was a dodgy batch which is unlikely) so the answer to the original question is no.

24-02-06, 02:06 PM

Afternoon all

I'm not sure how relevant this is but... I run a classic Lotus that is designed to run on 98 ron fuel, a few of the guys from my local club have tried Tesco fuel and nearly all have suffered from poor running. I'm not suggesting that this is the only problem in this case, but I certainly won't be putting it i my bike.

Cheers

Paul

24-02-06, 11:32 AM	#17
jambo Member Mega Poster Join Date: Aug 2003 Location: Croydonia Posts: 5,376	I only tend to see carb icing when I've been unning for a bit as it's to do with moisture in the air coming over the jets yada yada yada... Check the battry's fully charged and the connections are good, but I'd think the cold's just causing it some greif. I'm always happy with standard 95RON stuff from where ever, but it's doubtful anything higher would hurt. __________________ Modern motorcycles are bloody brilliant, enjoy it while we can

24-02-06, 01:15 PM	#18
BillyC Moderator Mega Poster Join Date: Nov 2003 Location: The exiles of Kent Posts: 2,184	The fuel is fine, your bike has the compression to handle such fuels. However, you have drastically affected the fueling of the bike, and the back pressure from the exhaust. It's no surprise that performance has been affected, and the tuning will be all off. Get it checked. __________________ SV650 K3 - Gone. Now a member of the SV650.org Kawasaki brigade!

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24-02-06, 10:45 AM	#11
Jelster Guest Posts: n/a	Carb icing ?? Just a thought.... Never suffered it with my curvey but I know it can be a problem. I always run my 'Blade on Optimax whenever I can, the tank range tends to be better... .

24-02-06, 11:04 AM	#14
chazzyb Guest Posts: n/a	I believe the Tesco 99 RON juice is actually a 5% Ethanol/petrol mix. But I wouldn't have thought it would upset anything, unless it is icing with a change in fuel volatility. Unless an engine management system can advance the ignition timing to take advantage of the higher octane rating, it's debatable that you'll get any tangible benefit from spending more money over the cooking fuel.

24-02-06, 01:16 PM	#19
Toypop Guest Posts: n/a	I'd stake a years wages that the fuel has absolutely nothing to do with it (unless it was a dodgy batch which is unlikely) so the answer to the original question is no.

24-02-06, 02:06 PM	#20
Wootan Guest Posts: n/a	Afternoon all I'm not sure how relevant this is but... I run a classic Lotus that is designed to run on 98 ron fuel, a few of the guys from my local club have tried Tesco fuel and nearly all have suffered from poor running. I'm not suggesting that this is the only problem in this case, but I certainly won't be putting it i my bike. Cheers Paul